More info for implement this action Readme

[LucasGinard]

Hi, thanks for providing this action 👏

I'd like to contribute by adding additional information on how to implement this action. When I was looking for a way to implement it in my project (using CocoaPods), I couldn't find clear instructions.

I tried implementing other actions, but they didn't work as expected. Then, I went back and searched in the issues to see if it could be used with CocoaPods. I found this issue, which provided a successful implementation.

That's why I'd like to contribute by adding an example of how to implement it with CocoaPods.

[ffried]

@LucasGinard Thanks for enhancing the documentation.
I've made some changes to your initial patch:

• Removed the icon from the title
  • It's our company logo, not an icon specific to this action.
• Removed the section describing compatibility
  • The compatibility for this action is simple: If you can use xcodebuild, you can use this action. I can this statement to the README, but I think it should be obvious. 😉
• Removed the section describing the action input
  • As mentioned in the description for the action input in action.yml, this is the same as xcodebuilds action parameter. So as with all other inputs, the description for it can be found in man xcodebuild. I don't want to keep this README up to date with changes to how parameters of xcodebuild works. Also, we don't do any special input validation - we just pass it on to xcodebuild.
  • I did, however, add a note about man xcodebuild to the "Inputs" section.
• I re-structured the "Examples" section into having three expandable details blocks: One for Swift packages, one for normal Xcode projects and one for workspaces. IMHO it's not required to have a special example for CocoaPods, since it simply uses workspaces.