refactor: add build script for bundling

Author: csvn

.github/workflows/test.yml

@@ -97,3 +97,19 @@ jobs:
 
       - name: Check types
         run: deno check src/main.ts
+
+  build-diff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Deno
+        uses: ./
+        with:
+          deno-version: "rc"
+
+      - name: Build code
+        run: deno run -A scripts/build.ts
+
+      - name: Assert no git changes
+        run: git diff --quiet

action.yml

@@ -20,4 +20,4 @@ outputs:
     description: "The release channel of the installed version."
 runs:
   using: "node20"
-  main: "main.mjs"
+  main: "dist/main.mjs"

deno.json

@@ -1,10 +1,16 @@
 {
   "lock": false,
-  "nodeModulesDir": "none",
+  "nodeModulesDir": "auto",
   "license": "MIT",
   "compilerOptions": {
     "lib": ["esnext"]
   },
+  "exclude": [
+    "dist"
+  ],
+  "tasks": {
+    "build": "deno run -A scripts/build.ts"
+  },
   "imports": {
     "@actions/core": "npm:@actions/core@^1.11.1",
     "@actions/tool-cache": "npm:@actions/tool-cache@^2.0.2",