feat: add versioning and release automation

- Add semantic-release with changelog and git plugins
- Add manual version bump script (patch/minor/major)
- Add GitHub Actions workflow for automated releases
- Add npm scripts for version management
- Setup .releaserc.json for semantic-release configuration

.releaserc.json

@@ -0,0 +1,14 @@
+{
+  "branches": ["main"],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/changelog",
+    "@semantic-release/npm",
+    ["@semantic-release/git", {
+      "assets": ["package.json", "CHANGELOG.md"],
+      "message": "chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}"
+    }],
+    "@semantic-release/github"
+  ]
+}