[#39] Optimize the workflow to generate the "sample" project before executing CI actions

[luongvo]

• Close Optimize the workflow to generate the "sample" project before executing CI actions #39

What happened 👀

• Modify the test.yml workflow to generate the sample project before executing test actions on Android or iOS platforms.
• Add cancel previous runs.
• Separate danger report between Android and iOS.
• Fix: Running Danger SwiftFormat from the non-root directory.
• Add the initial contribution guide for git-submodule.

Insight 📝

The Danger for iOS has an issue when running from the non-root directory: sample/ios, which makes the SwiftFormat can not file expected files because of duplicating the sample/ios path https://github.com/nimblehq/kmm-templates/actions/runs/5982564343/job/16231801560 💥

• The cause is while danger-ruby-swiftformat returns the list of swift files with the full path from the root dir, e.g. sample/ios/fastlane/Constants/Constant.swift, including sample/ios, SwiftFormat joins them with the current working dir /Users/runner/work/kmm-templates/kmm-templates/sample/ios/.

• There is no official support to bypass this issue. I made a workaround to modify the danger-ruby-swiftformat source to remove the sample/ios prefix from all files by using this operator .map { |file| file.partition('sample/ios/').last } 🙏

     files
       .select { |file| file.end_with?(".swift") }
       .reject { |file| @exclude.any? { |glob| File.fnmatch(glob, file) } }
       .uniq.map { |file| file.partition('sample/ios/').last }
       .sort
  

Proof Of Work 📹

The workflow works properly as it is.

[luongvo]

@phongvhd93 @markgravity @kaungkhantsoe This PR is now ready for review, too 🎉

[github-actions]

	1 Warning
⚠️	This pull request is quite big (618 lines changed), please consider splitting it into multiple pull requests.

SwiftFormat found issues:

File	Rules
fastlane/Constants/Constant.swift:122:1	warning: (trailingSpace) Remove trailing space at end of a line.
fastlane/Constants/Constant.swift:129:1	warning: (trailingSpace) Remove trailing space at end of a line.
fastlane/Constants/Constant.swift:145:1	warning: (trailingSpace) Remove trailing space at end of a line.
fastlane/Constants/Constant.swift:153:1	warning: (trailingSpace) Remove trailing space at end of a line.
fastlane/Constants/Constant.swift:160:1	warning: (trailingSpace) Remove trailing space at end of a line.
fastlane/Constants/Constant.swift:164:1	warning: (spaceAroundOperators) Add or remove space around operators or delimiters.
fastlane/Constants/Constant.swift:167:1	warning: (trailingSpace) Remove trailing space at end of a line.

Current coverage for sample is 18.25%

✅ No files affecting coverage found

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[kaungkhantsoe]

LGTM 👍