[Feature] Add -k, --kinda-quiet flag to suppress all output except for the .xcodeproj path upon success

[tww0003]

I'm open to suggestions on the flag name.

What?

Adds a new flag that suppresses all output aside from the .xcodeproj path upon success.

Why?

To allow for easier scripting.

For example, I generally quit Xcode before running xcodegen, then use the open command to open the project like this:

tyler@mbp Example % xcodegen

⚙️  Generating plists...
⚙️  Generating project...
⚙️  Writing project...
Created project at /Users/tyler/Example/Example.xcodeproj
tyler@mbp Example % open Example.xcodeproj

Since having to always enter the same two commands is slightly annoying to me, I wanted to combine them into one command and use that in an alias.

Without the flag I would need to do something like this:

xcodegen | grep "Created project at" | cut -d ' ' -f 4 | xargs -I project open project

With the flag it can be simplified to just:

xcodegen -k | xargs -I project open project

Example Use

tyler@mbp Example % xcodegen -k
/User/tyler/Example/Example.xcodeproj