docs: Explain json schema for dialogs

docs/src/fancydialogs/getting-started.md

@@ -24,4 +24,49 @@ To check if the plugin is installed correctly, you can use the command `/fancydi
 
 ## Create your first dialog
 
-TODO
+FancyDialogs come with some default dialogs, which you can use to get started. You can find them in the `plugins/FancyDialogs/data/dialogs` folder. 
+You can also create your own dialogs by creating a new file in this folder.
+
+FancyDialogs uses a simple JSON format to define dialogs. Here is an example of a simple dialog:
+
+```json
+{
+  "id": "my_dialog",
+  "title": "My Fancy Dialog",
+  "canCloseWithEscape": true,
+  "body": [
+    { "text": "This is my first dialog created with FancyDialogs!" }
+  ],
+  "buttons": [
+    {
+      "label": "Visit our website",
+      "tooltip": "Click to visit our website!",
+      "actions": [
+        {
+          "name": "message",
+          "data": "Visit our website here: LINK TO WEBSITE"
+        }
+      ]
+    }
+  ]
+}
+```
+
+The fields in this dialog are as follows:
+
+- `id`: The unique identifier for the dialog, which is used to reference the dialog in commands or other dialogs
+- `title`: The title of the dialog, which is displayed at the top of the dialog (supports MiniMessage & PlaceholderAPI)
+- `canCloseWithEscape`: Whether the dialog can be closed with the Escape key (default: true)
+- `body`: The body of the dialog, which can contain text (and items soon)
+  - `text`: The text to display in the body of the dialog (supports MiniMessage & PlaceholderAPI)
+- `buttons`: The buttons of the dialog, which can contain text, tooltips and actions
+  - `label`: The text to display on the button (supports MiniMessage & PlaceholderAPI)
+  - `tooltip`: The tooltip to display when hovering over the button (supports MiniMessage & PlaceholderAPI)
+  - `actions`: The actions to perform when the button is clicked
+    - `name`: The name of the action, which can be one of the following:
+      - `message`: Sends a message to the player
+      - `console_command`: Executes a command as the console
+      - `player_command`: Executes a command as the player
+      - `open_dialog`: Opens another dialog
+      - `send_to_server`: Sends the player to another server (requires BungeeCord or Velocity)
+    - `data`: The data for the action, which depends on the action type (e.g. for `message`, it is the message to send or for `open_dialog`, it is the ID of the dialog to open)