Merge pull request #7 from sakars/readme-update

readme update

Author: sakars

README.md

@@ -1,2 +1,21 @@
 # JSOG
 [![Build and Test](https://github.com/sakars/JSOG/actions/workflows/cmake-single-platform.yml/badge.svg)](https://github.com/sakars/JSOG/actions/workflows/cmake-single-platform.yml)
+
+This is a tool for generating C++ files from JSON Schemas.
+
+## Usage
+`JSOG [options] <schema files>`
+
+## Options
+- `--help`: Display help message.
+- `-h`: Alias for `--help`.
+- `--output-directory <path>`: Output directory for generated files. Default is current directory.
+- `-o`: Alias for `--output-directory`.
+- `--dump-schemas`: Logs intermediate representation of schemas
+for debugging purposes.
+- `-d`: Alias for `--dump-schemas`.
+- `--require <uri>`: Adds a JSON Schema URI to the list of required schemas.
+- `-r`: Alias for `--require`.
+- `--preferred-identifier <uri> <identifier>`: Sets the preferred identifier for a schema.
+- `-p`: Alias for `--preferred-identifier`.
+