feat: make entry point executable

[leonardoanalista]

Allow and document a second config option:

Options 1

• as it is today

Options 2 (new)

Standalne - No Changes to your git repository*. This is suitable when your team is not ready to roll cz-customizable across all teams but you still would like to use it for your own commits, no matter the project.

Steps:

• create config file:
  • create a file called .cz-config.js in your git repository root (*Asumptions: you do a global git ignore on ~/.gitignore_global for .cz-config.js). Or;
  • create a file called .cz-config.js your home directory.
• npm install -g commitizen
• npm install -g cz-customizable. Make sure you have version >v5.6.x
• create global commitizen config file .czrc: echo '{ "path": "cz-customizable" }' > ~/.czrc
• now run: npx git-cz or git cz.

[leonardoanalista]

🎉 This PR is included in version 5.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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