ci: add changeset to release pkg automatically

[zanminkian]

Steps for you:

1. Open Settings -> Actions -> General, and then tick Allow GitHub Actions to create and approve pull requests
2. Open Settings -> Secrets and variables -> Actions，and then create a NPM_TOKEN.

3. Accept this PR.

After finishing steps above, github bot will create a PR named chore: release automatically. If you accept the chore: release PR, github action will release this pkg to npm.

Check the example of my project: https://github.com/zanminkian/tsconfig.
Check the doc of changesets action: https://github.com/changesets/action

[legend80s]

Very much learned by the automatic publish flow and I will definitely try it in some other projects,
but it may not fit this project because I will do code adjustment before publishing sometimes.

Thanks very much maybe I will try it in the future.