docs: add a method to deploy vuepress site with github actions

[jenkey2011]

Summary

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Build-related changes
• Other, please describe:

If changing the UI of default theme, please provide the before/after screenshot:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)

You have tested in the following browsers: (Providing a detailed version will be better.)

• Chrome
• Firefox
• Safari
• Edge
• IE

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature
• Related documents have been updated
• Related tests have been updated

To avoid wasting your time, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[kefranabg]

@jenkey2011 Could you provide a minimalist repos that uses your GitHub action and give me the rights so I can test it?

[jenkey2011]

Demo

see: https://github.com/jenkey2011/vuepress-deploy-demo

Detail

The following guides are based on some shared assumptions:

• Source code repository(vuepress-deploy-demo), we call it A
• Target repository(vuepress-deploy-demo-target), we call it B

There are three situations. Each situation corresponds to a deployment file.

• A TO A:gh_pages: deploy-to-current-repo-gh_pages.yml
• A TO B:master: deploy-to-other-repo-master.yml
• A TO B:custom_branch: deploy-to-other-repo-custom_branch.yml

Here we can see:

• The action: https://github.com/jenkey2011/vuepress-deploy-demo/actions

• A TO A:gh_pages: https://github.com/jenkey2011/vuepress-deploy-demo/tree/gh_pages

• A TO B:master:https://github.com/jenkey2011/vuepress-deploy-demo-target/tree/master

• A TO B:custom_branch:https://github.com/jenkey2011/vuepress-deploy-demo-target/tree/custom_branch

• The GitHub Pages of the repository B： https://jenkey2011.github.io/vuepress-deploy-demo-target/

[jenkey2011]

Hi @kefranabg , hope you can take a look 😆😆😆

[kefranabg]

Sorry, so much things to do 😅 I'll try to review ASAP !

[jenkey2011]

Any one?