chore(docs): isolate type_definitions from docs related types

Prevents auto loading of @types packages by TypeScript test config. This avoids docs @types/mdx leaking into Blockly’s type_definitions check.

Author: grega

packages/blockly/tests/typescript/tsconfig.json

@@ -4,6 +4,7 @@
     "allowJs": false,
     "outDir": "dist",
     "baseUrl": ".",
+    "types": [],
     "paths": {
       "blockly-test/*": ["../../dist/*"]
     },