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

.github/dependabot.yaml

@@ -7,3 +7,12 @@ updates:
     commit-message:
       prefix: chore
     labels: [chore]
+
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: daily
+    commit-message:
+      prefix: chore
+    labels: [chore]
+    versioning-strategy: increase