Add --zip flags to build command

[cezaraugusto]

When users run npx extension build <path>, add a few flags related to the distribution package:

• --zip [boolean]: whether or not to compress the extension into a ZIP file. Defaults to false
• --zip-source [boolean]: whether or not to include the source files in the ZIP file. Defaults to false
• --zip-filename <string>: specify the name of the ZIP file. Defaults to the extension name and version, like my-ext-name-1.0.0.zip.

How to test

1. Have an extension
2. Running yarn extension build <extension-path> --zip should generate a zip file from distribution files to (projectPath)/dist/<browser>/<zip-name>.zip
3. Running yarn extension build <extension-path> --zip-source should generate a zip file from source files to (projectPath)/dist/<browser>/<zip-name>-source.zip
4. Running yarn extension build <extension-path> --zip --zip-filename=my-custom-name should generate a zip file from distribution files (with custom name) to (projectPath)/dist/<browser>/<custom-zip-name>.zip.

[OSpoon]

Hi~ @cezaraugusto, I have verified these distribution package-related flags and confirmed that they are all working as expected. However, when using the --zip-source flag, have you considered excluding the node_modules directory from the zip file ❓

[cezaraugusto]

@OSpoon you're right! Now it only adds files not specified by .gitignore. I updated the output as well

[OSpoon]

Hi~ @cezaraugusto, I think some further improvement is needed. The current zip file is missing the directory structure of the source.

[OSpoon]

LGTM++

Thank you very much for inviting me to review your code. I believe this PR can be merged, and I also find the addition of these flags very useful. 😁

[cezaraugusto]

Thanks @OSpoon!