Update page descriptions for llms.txt and MCP servers (#1340)

* Deploy page descriptions

* API reference descriptions

* Develop/concepts descriptions

* Quick starts & tutorials descriptions

* Get started descriptions

* Revise get started descriptions

* Revise API reference descriptions

* Revise concepts and quick references descriptions

* Revise development tutorial descriptions

* Revise share preview description

* Typos from copilot review

Author: sfc-gh-dmatthews

content/deploy/_index.md

@@ -1,6 +1,8 @@
 ---
 title: Deploy
 slug: /deploy
+description: Deploy your Streamlit apps to various platforms including Community Cloud, Snowflake, and other cloud providers with comprehensive guides.
+keywords: deploy, deployment, community cloud, snowflake, cloud, hosting, share
 ---
 
 # Deploy

content/deploy/community-cloud/_index.md

@@ -1,6 +1,8 @@
 ---
 title: Streamlit Community Cloud
 slug: /deploy/streamlit-community-cloud
+description: Deploy and manage Streamlit apps for free with Community Cloud - connect to GitHub, deploy in minutes, and share with the world.
+keywords: community cloud, deploy, free, github, hosting, share, manage, streamlit
 ---
 
 # Welcome to Streamlit Community Cloud

content/deploy/community-cloud/deploy-your-app/_index.md

@@ -1,6 +1,8 @@
 ---
 title: Prep and deploy your app on Community Cloud
 slug: /deploy/streamlit-community-cloud/deploy-your-app
+description: Complete guide to preparing and deploying your Streamlit app on Community Cloud with file organization, dependencies, and secrets management.
+keywords: deploy, community cloud, preparation, file organization, dependencies, secrets, deployment guide
 ---
 
 # Prep and deploy your app on Community Cloud

content/deploy/community-cloud/deploy-your-app/app-dependencies.md

@@ -1,6 +1,8 @@
 ---
 title: App dependencies for your Community Cloud app
 slug: /deploy/streamlit-community-cloud/deploy-your-app/app-dependencies
+description: Learn how to manage Python and external dependencies for your Community Cloud app using requirements.txt, packages.txt, and other package managers.
+keywords: dependencies, requirements.txt, packages.txt, pip, apt-get, python packages, external dependencies, package managers
 ---
 
 # App dependencies for your Community Cloud app

content/deploy/community-cloud/deploy-your-app/deploy.md

@@ -1,6 +1,8 @@
 ---
 title: Deploy your app on Community Cloud
 slug: /deploy/streamlit-community-cloud/deploy-your-app/deploy
+description: Step-by-step guide to deploy your Streamlit app on Community Cloud including repository selection, configuration, and deployment process.
+keywords: deploy, community cloud, repository, entrypoint, python version, secrets, subdomain, deployment process
 ---
 
 # Deploy your app on Community Cloud

content/deploy/community-cloud/deploy-your-app/file-organization.md

@@ -1,6 +1,8 @@
 ---
 title: File organization for your Community Cloud app
 slug: /deploy/streamlit-community-cloud/deploy-your-app/file-organization
+description: Learn how to organize your files, dependencies, and configuration for successful Community Cloud deployment including subdirectories and multiple apps.
+keywords: file organization, repository structure, entrypoint, dependencies, configuration, subdirectories, multiple apps, git lfs
 ---
 
 # File organization for your Community Cloud app

content/deploy/community-cloud/deploy-your-app/secrets-management.md

@@ -1,6 +1,8 @@
 ---
 title: Secrets management for your Community Cloud app
 slug: /deploy/streamlit-community-cloud/deploy-your-app/secrets-management
+description: Learn how to securely manage secrets, credentials, and API keys for your Community Cloud app using the secrets management interface.
+keywords: secrets, credentials, api keys, security, st.secrets, secrets.toml, environment variables, advanced settings
 ---
 
 # Secrets management for your Community Cloud app

content/deploy/community-cloud/get-started/_index.md

@@ -1,6 +1,8 @@
 ---
 title: Get started with Streamlit Community Cloud
 slug: /deploy/streamlit-community-cloud/get-started
+description: Get started with Streamlit Community Cloud - create your account, connect GitHub, and deploy your first app with step-by-step guides.
+keywords: get started, community cloud, account, github, deploy, quickstart, workspace, templates
 ---
 
 # Get started with Streamlit Community Cloud

content/deploy/community-cloud/get-started/connect-github.md

@@ -1,6 +1,8 @@
 ---
 title: Connect your GitHub account
 slug: /deploy/streamlit-community-cloud/get-started/connect-your-github-account
+description: Connect your GitHub account to Community Cloud to deploy apps from public and private repositories with proper permissions.
+keywords: github, connect, oauth, repositories, public, private, permissions, organization, access
 ---
 
 # Connect your GitHub account

content/deploy/community-cloud/get-started/create-your-account.md

@@ -1,6 +1,8 @@
 ---
 title: Create your account
 slug: /deploy/streamlit-community-cloud/get-started/create-your-account
+description: Learn how to create your Streamlit Community Cloud account using email, Google, or GitHub authentication methods.
+keywords: create account, sign up, authentication, email, google, github, oauth, community cloud
 ---
 
 # Create your account
@@ -26,19 +28,16 @@ Community Cloud allows you to sign in using one of the three following methods:
 1. Continue with one of the three options listed below.
 
    ### Option 1: Sign in using emailed codes
-
    1. In the "Email" field, enter your email address.
    1. Click "**Continue**." (If prompted, verify you are human.)
    1. Go to your email inbox, and copy your one-time, six-digit code. The code is valid for ten minutes.
    1. Return to the authentication page, and enter your code. (If prompted, verify you are human.)
 
    ### Option 2: Sign in using Google
-
    1. Click "**Continue with Google**."
    1. Enter your Google credentials, and follow Google's authentication prompts.
 
    ### Option 3: Sign in using GitHub
-
    1. Click "**Continue with GitHub**."
    1. Enter your GitHub credentials, and follow GitHub's authentication prompts.