feat(api): add a preference to disable the API

[jvoisin]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a configurable preference to enable or disable Miniflux's API functionality. When disabled, API routes and related UI elements are hidden from users.

• Adds a new API configuration option that defaults to enabled
• Conditionally renders API-related UI elements and routes based on the configuration
• Updates documentation to describe the new API configuration option

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
miniflux.1	Adds documentation for the new API configuration option
internal/config/options.go	Defines the new enabledAPI configuration field and accessor method
internal/config/parser.go	Adds parsing logic for the API configuration option
internal/http/server/httpd.go	Conditionally registers API routes based on configuration
internal/ui/ui.go	Conditionally registers API key management routes based on configuration
internal/ui/view/view.go	Passes API enabled status to templates
internal/template/templates/common/settings_menu.html	Conditionally displays API keys menu item

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