docs: update PLUGIN docs (#443)

PLUGINS/plugin-schema.json

@@ -0,0 +1,115 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://danklinux.com/schemas/plugin.json",
+  "title": "DankMaterialShell Plugin Manifest",
+  "description": "Schema for DankMaterialShell plugin.json manifest files",
+  "type": "object",
+  "required": [
+    "id",
+    "name",
+    "description",
+    "version",
+    "author",
+    "type",
+    "capabilities",
+    "component"
+  ],
+  "properties": {
+    "id": {
+      "type": "string",
+      "description": "Unique plugin identifier (camelCase, no spaces)",
+      "pattern": "^[a-zA-Z][a-zA-Z0-9]*$"
+    },
+    "name": {
+      "type": "string",
+      "description": "Human-readable plugin name",
+      "minLength": 1
+    },
+    "description": {
+      "type": "string",
+      "description": "Short description of plugin functionality",
+      "minLength": 1
+    },
+    "version": {
+      "type": "string",
+      "description": "Semantic version string (e.g., '1.0.0')",
+      "pattern": "^\\d+\\.\\d+\\.\\d+(-[a-zA-Z0-9.-]+)?(\\+[a-zA-Z0-9.-]+)?$"
+    },
+    "author": {
+      "type": "string",
+      "description": "Plugin creator name or email",
+      "minLength": 1
+    },
+    "type": {
+      "type": "string",
+      "description": "Plugin type",
+      "enum": ["widget", "daemon", "launcher"]
+    },
+    "capabilities": {
+      "type": "array",
+      "description": "Array of plugin capabilities",
+      "items": {
+        "type": "string"
+      },
+      "minItems": 1
+    },
+    "component": {
+      "type": "string",
+      "description": "Relative path to main QML component file",
+      "pattern": "^\\./.*\\.qml$"
+    },
+    "trigger": {
+      "type": "string",
+      "description": "Trigger string for launcher activation (required for launcher type)"
+    },
+    "icon": {
+      "type": "string",
+      "description": "Material Design icon name"
+    },
+    "settings": {
+      "type": "string",
+      "description": "Path to settings component QML file",
+      "pattern": "^\\./.*\\.qml$"
+    },
+    "requires_dms": {
+      "type": "string",
+      "description": "Minimum DMS version requirement (e.g., '>=0.1.18', '>0.1.0')",
+      "pattern": "^(>=?|<=?|=|>|<)\\d+\\.\\d+\\.\\d+$"
+    },
+    "requires": {
+      "type": "array",
+      "description": "Array of required system tools/dependencies",
+      "items": {
+        "type": "string"
+      }
+    },
+    "permissions": {
+      "type": "array",
+      "description": "Required capabilities",
+      "items": {
+        "type": "string",
+        "enum": [
+          "settings_read",
+          "settings_write",
+          "process",
+          "network"
+        ]
+      }
+    }
+  },
+  "allOf": [
+    {
+      "if": {
+        "properties": {
+          "type": {
+            "const": "launcher"
+          }
+        }
+      },
+      "then": {
+        "required": ["trigger"]
+      }
+    }
+  ],
+  "additionalProperties": true
+}