feat: add TYPE/STRUCT and DATA_BLOCK support to tree-sitter grammar

- Add type_definition rule for UDT files (TYPE/STRUCT/END_STRUCT/END_TYPE)
- Add data_block rule for DB files (DATA_BLOCK/BEGIN/END_DATA_BLOCK)
- Add NON_RETAIN and RETAIN modifiers support in data blocks
- Keywords now highlighted correctly in .udt and .db files

src/node-types.json

@@ -193,6 +193,60 @@
       ]
     }
   },
+  {
+    "type": "data_block",
+    "named": true,
+    "fields": {
+      "name": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          },
+          {
+            "type": "string",
+            "named": true
+          }
+        ]
+      }
+    },
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "attribute_list",
+          "named": true
+        },
+        {
+          "type": "identifier",
+          "named": true
+        },
+        {
+          "type": "keyword",
+          "named": true
+        },
+        {
+          "type": "number",
+          "named": true
+        },
+        {
+          "type": "statement",
+          "named": true
+        },
+        {
+          "type": "string",
+          "named": true
+        },
+        {
+          "type": "var_declaration",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "else_clause",
     "named": true,
@@ -851,6 +905,10 @@
       "multiple": true,
       "required": false,
       "types": [
+        {
+          "type": "data_block",
+          "named": true
+        },
         {
           "type": "function",
           "named": true
@@ -866,6 +924,10 @@
         {
           "type": "statement",
           "named": true
+        },
+        {
+          "type": "type_definition",
+          "named": true
         }
       ]
     }
@@ -989,6 +1051,60 @@
       ]
     }
   },
+  {
+    "type": "type_definition",
+    "named": true,
+    "fields": {
+      "name": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          },
+          {
+            "type": "string",
+            "named": true
+          }
+        ]
+      }
+    },
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "attribute_list",
+          "named": true
+        },
+        {
+          "type": "block_comment",
+          "named": true
+        },
+        {
+          "type": "identifier",
+          "named": true
+        },
+        {
+          "type": "keyword",
+          "named": true
+        },
+        {
+          "type": "number",
+          "named": true
+        },
+        {
+          "type": "string",
+          "named": true
+        },
+        {
+          "type": "var_item",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "unary_expression",
     "named": true,