feat: Enhance global settings with type support

- Updated global settings schema to include a 'type' field for each setting, allowing for 'string', 'number', or 'boolean' types.
- Modified the GlobalSettingsService to handle typed values, including validation and conversion methods.
- Adjusted plugin settings to specify types for each configuration option.
- Updated migration files to add the new 'type' column to the globalSettings table.
- Enhanced validation logic in the global settings route to ensure values match their declared types.
- Updated tests to cover new type functionality for global settings.

Author: JasonKrik

services/backend/PLUGINS.md

@@ -366,7 +366,8 @@ class MyAwesomePlugin implements Plugin {
     settings: [
       {
         key: 'myAwesomePlugin.features.enableSuperFeature',
-        defaultValue: 'true',
+        defaultValue: true,
+        type: 'boolean',
         description: 'Enables the super feature of this plugin.',
         encrypted: false,
         required: false,
@@ -375,17 +376,28 @@ class MyAwesomePlugin implements Plugin {
       {
         key: 'myAwesomePlugin.credentials.externalApiKey',
         defaultValue: '',
+        type: 'string',
         description: 'API key for an external service used by this plugin.',
         encrypted: true, // Sensitive value, will be encrypted
         required: true,
         groupId: 'my_awesome_plugin_group',
       },
+      {
+        key: 'myAwesomePlugin.performance.maxRetries',
+        defaultValue: 5,
+        type: 'number',
+        description: 'Maximum number of retries for API calls.',
+        encrypted: false,
+        required: false,
+        groupId: 'my_awesome_plugin_group',
+      },
       {
         // Example of a setting not belonging to a new custom group
         // It might appear in a default group or ungrouped in the UI,
         // or you can assign it to an existing core group ID if appropriate.
         key: 'myAwesomePlugin.performance.cacheDurationSeconds',
-        defaultValue: '3600',
+        defaultValue: 3600,
+        type: 'number',
         description: 'Cache duration in seconds for plugin data.',
         encrypted: false,
         required: false,

services/backend/drizzle/migrations_sqlite/0008_mysterious_calypso.sql

@@ -0,0 +1 @@
+ALTER TABLE `globalSettings` ADD `type` text DEFAULT 'string' NOT NULL;