feat: add release-it in workflow

[asrvd]

this pr adds release-it for auto releasing the package to github and npm.

things you need to do to make it work @nexxeln

1. generate a github access token with repo scope.
2. create a env file and follow the content of .env.example file i have added in the commit https://github.com/asheeeshh/create-t3-app/blob/dev/.env.example.
3. whenever you want to release a new version, run pnpm run release on terminal and proceed with yes for each prompt. It will automatically release the version on github and npm for you.

ps: it auto increments the version in pkg json so make sure you don't increment it yourself.

moreover, i don't think its interfering with the change set we are maintaining, i would still like to have @MWhite-22 's thoughts on this before you merge the pr.

[MWhite-22]

So I think, rather than adding in a package to do this, a GitHub action (as implemented in #66) is the more imperative way of releasing updates.

Ultimately the decision lies with @nexxeln though.

[asrvd]

what nexxeln wanted was "to be able to automate releasing versions on github", is there any way we can achieve that through actions? 🤔