feat(deno.json): add repository field to plugin-code-execution package

Adds a "repository" field to deno.json for @mcpc/plugin-code-execution, enabling better package discovery and tooling compatibility.

Author: yaonyan

packages/plugin-code-execution/deno.json

@@ -1,6 +1,10 @@
 {
   "name": "@mcpc/plugin-code-execution",
   "version": "0.0.1",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcpc-tech/mcpc.git"
+  },
   "exports": {
     ".": "./mod.ts",
     "./plugin": "./src/plugin.ts",