feat: improve handling of config to allow overrides

rte/main.tsx

@@ -181,7 +181,17 @@ async function init() {
         const savedSelection = rte?.selection?.get() ?? undefined;
 
         // @ts-expect-error: Added at runtime
-        const config = await rte.getConfig();
+        const appConfig = await rte.getConfig();
+
+        // This is the configuration for this instance of the plugin.
+        // You edit this in the content types settings RTE plugin section.
+        // @ts-expect-error: Added at runtime
+        const pluginConfig = await rte.getFieldConfig();
+
+        const config = {
+          ...appConfig,
+          ...pluginConfig,
+        };
 
         openImageVault({
           config,