build: initialize JavaScript Action project (#69)

* build: initialize JavaScript action project

* chore(dependabot): check for npm package updates

* style: ignore `main` dir and `README.md` from being formatted

* ci: add Build workflow that contains Build Package job

* ci: add Test Package job in the Test workflow

* test: add an empty `main.test.ts` test

* chore: adjust Git attributes for `main/index.mjs` file

* docs(readme): add a build status badge

tsconfig.json

@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "declaration": true,
+    "outDir": "dist",
+    "sourceMap": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["ES2022"],
+    "target": "ES2022",
+    "skipLibCheck": true
+  },
+  "include": ["src"],
+  "exclude": ["**/*.test.*"]
+}