docs: update README to reflect JSON configuration format for plugins

Signed-off-by: Deluan <deluan@navidrome.org>

plugins/examples/crypto-ticker/README.md

@@ -12,11 +12,12 @@ This is a WebSocket-based WASM plugin for Navidrome that displays real-time cryp
 
 ## Configuration
 
-In your `navidrome.toml` file, add:
+Configure in the Navidrome UI (Settings → Plugins → crypto-ticker):
 
-```toml
-[PluginConfig.crypto-ticker]
-tickers = "BTC,ETH,SOL,MATIC"
+```json
+{
+  "tickers": "BTC,ETH,SOL,MATIC"
+}
 ```
 
 - `tickers` is a comma-separated list of cryptocurrency symbols

plugins/examples/discord-rich-presence/README.md

@@ -61,12 +61,13 @@ To work within this model the plugin stores no in-memory state. Connections are
 
 ## Configuration
 
-Add the following to `navidrome.toml` and adjust for your tokens:
+Configure in the Navidrome UI (Settings → Plugins → discord-rich-presence):
 
-```toml
-[PluginConfig.discord-rich-presence]
-ClientID = "123456789012345678"
-Users = "alice:token123,bob:token456"
+```json
+{
+  "clientid": "123456789012345678",
+  "users": "alice:token123,bob:token456"
+}
 ```
 
 - `ClientID` is your Discord application ID

plugins/examples/library-inspector/README.md

@@ -48,11 +48,12 @@ Folder = "/path/to/plugins"
 
 ## Configuration
 
-Configure the inspection interval in the Navidrome UI or via config file:
+Configure the inspection interval in the Navidrome UI (Settings → Plugins → library-inspector):
 
-```toml
-[PluginConfig.library-inspector]
-cron = "@every 5m"
+```json
+{
+  "cron": "@every 5m"
+}
 ```
 
 ### Cron Expression Examples

plugins/examples/nowplaying-py/README.md

@@ -43,11 +43,12 @@ extism-py plugin/__init__.py -o nowplaying-py.wasm
    Folder = "/path/to/plugins"
    ```
 
-3. Configure the plugin (optional):
-   ```toml
-   [PluginConfig.nowplaying-py]
-   cron = "*/1 * * * *"  # Check every minute (default)
-   user = "admin"        # Navidrome user for API calls (default)
+3. Configure the plugin in the UI (Settings → Plugins → nowplaying-py):
+   ```json
+   {
+     "cron": "*/1 * * * *",
+     "user": "admin"
+   }
    ```
 
 ### Configuration Options

plugins/examples/webhook-rs/README.md

@@ -37,15 +37,12 @@ Copy `webhook-rs.wasm` to your Navidrome plugins folder (configured via `Plugins
 
 ## Configuration
 
-Add the plugin configuration to your `navidrome.toml`:
+Configure in the Navidrome UI (Settings → Plugins → webhook-rs):
 
-```toml
-[Plugins]
-Enabled = true
-Folder = "/path/to/plugins"
-
-[PluginConfig.webhook-rs]
-urls = "https://example.com/webhook,https://another.example.com/notify"
+```json
+{
+  "urls": "https://example.com/webhook,https://another.example.com/notify"
+}
 ```
 
 ### Configuration Options