Adding watcher tool

[mohamedallam1991]

Watcher is a cli tool that is a Go package for watching for files or directory changes without using filesystem events for your Go projects.

[avelino]

Thank you for contributing with awesome-go, we will revise your contribution as soon as possible.

Automation body links content check:

• godoc.org or pkg.go.dev: True
• goreportcard.com: False
• coverage: False

your project is about to be approved, it's under revision, it may take a few days

[github-actions[bot]]

This PR has been automatically marked as stale because it has not had recent activity. They will wait 15 days for your interaction, after that the PR will be closed. Please read more in https://github.com/avelino/awesome-go/blob/master/CONTRIBUTING.md

[mohamedallam1991]

Watcher is a cli tool that is a Go package for watching for files or directory changes without using filesystem events for your Go projects.

• https://github.com/cosmtrek/air

• https://pkg.go.dev/github.com/cosmtrek/air

• https://goreportcard.com/report/github.com/cosmtrek/air

• https://app.codecov.io/gh/cosmtrek/air

• [x] The package has been added to the list in alphabetical order.
• [x] The package has an appropriate description with correct grammar.
• [x] As far as I know, the package has not been listed here before.
• [x] The repo documentation has a pkg.go.dev link.
• [x] The repo documentation has a coverage service link.
• [x] The repo documentation has a goreportcard link.
• [x] The repo has a version-numbered release and a go.mod file.
• [x] I have read the Contribution Guidelines, Maintainers Note and Quality Standards.
• [x] The repo has a continuous integration process that automatically runs tests that must pass before new pull requests are merged.
• [x] The authors of the project do not commit directly to the repo, but rather use pull requests that run the continuous-integration process.