Add JSON API documentation

[roshkhatri]

We need to add JSON API documentation for other modules to use valkeyJSON

[roshkhatri]

• PR for valkey-json: Adding all JSON command definition #42
• PR for valkey-doc: Adds valkey-json module commands documentation to the website. valkey-doc#243
• PR for website: Adding functionality for the JSON module to have commands displayed on the Valkey Website valkey-io.github.io#230