chore(tooling): remove release-it, keep only semantic-release for CI

release:auto (semantic-release) covers all release needs via CI.
Remove release-it dep, .release-it.json, and manual release script.
Update README to remove release-it examples.

Author: PierreBrisorgueil

README.md

@@ -109,8 +109,6 @@ npm run seed:mongodrop    # Drop database (with confirmation)
 
 ```bash
 npm run commit                                    # Commit with commitizen
-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)
 ```