fix(release): add .release-it.json config, update README release examples

- Add .release-it.json with explicit config (ci:false, commit message format,
  no npm publish, GitHub release enabled)
- Update README release examples from standard-version flags to release-it syntax

Author: PierreBrisorgueil

.release-it.json

@@ -0,0 +1,17 @@
+{
+  "ci": false,
+  "git": {
+    "commitMessage": "chore(release): ${version}",
+    "tagName": "v${version}",
+    "requireBranch": "master"
+  },
+  "github": {
+    "release": true
+  },
+  "npm": {
+    "publish": false
+  },
+  "plugins": {
+    "@release-it/conventional-changelog": false
+  }
+}

README.md

@@ -109,8 +109,8 @@ npm run seed:mongodrop    # Drop database (with confirmation)
 
 ```bash
 npm run commit                                    # Commit with commitizen
-npm run release -- --first-release                # First release
-npm run release -- --release-as 1.1.1             # Release specific version
+npm run release                                   # Interactive release (release-it)
+npm run release -- 1.1.1                          # Release specific version
 GITHUB_TOKEN=xxx npm run release:auto             # Semantic release (CI)
 ```