fix: enforce strict schema validation (#8)

Added 'additionalProperties: false' to app, categories, and project schemas to prevent extra properties. Removed unused 'metadata' field from Moonlight app JSON files to align with updated schemas.

Author: ReenigneArcher

apps/moonlight/moonlight-android.json

@@ -26,8 +26,5 @@
   "featured": true,
   "compatibility": {
     "sunshine": ">=0.1.0"
-  },
-  "metadata": {
-    "license": "GPL-3.0"
   }
 }

apps/moonlight/moonlight-qt.json

@@ -16,8 +16,5 @@
   "featured": true,
   "compatibility": {
     "sunshine": ">=0.1.0"
-  },
-  "metadata": {
-    "license": "GPL-3.0"
   }
 }

schemas/app.schema.json

@@ -4,6 +4,7 @@
   "description": "Schema for featured applications in the LizardByte app directory",
   "type": "object",
   "required": ["id", "name", "category", "description", "platforms"],
+  "additionalProperties": false,
   "properties": {
     "id": {
       "type": "string",
@@ -81,6 +82,7 @@
     },
     "compatibility": {
       "type": "object",
+      "additionalProperties": false,
       "properties": {
         "sunshine": {
           "type": "string",

schemas/categories.schema.json

@@ -4,12 +4,14 @@
   "description": "Schema for project-specific category definitions",
   "type": "object",
   "required": ["categories"],
+  "additionalProperties": false,
   "properties": {
     "categories": {
       "type": "array",
       "items": {
         "type": "object",
         "required": ["id", "name", "description"],
+        "additionalProperties": false,
         "properties": {
           "id": {
             "type": "string",

schemas/project.schema.json

@@ -4,6 +4,7 @@
   "description": "Schema for project-specific configuration",
   "type": "object",
   "required": ["id", "name"],
+  "additionalProperties": false,
   "properties": {
     "id": {
       "type": "string",