add loc workflow

[voprokudin]

The amount of LOC of your project without comments and empty lines

[Skyyo]

1. Looks there are a lot of redundant files( license eg) . In case we've simply copy pasted a ready solution - better to fork it to our organisation repo and include in gitHub actions as is, instead of manually pasting these files in each app. The workflows also should documented
   eg:
   step 1 check out
   step 2. what uses: ./app does
   etc.
   Also it's important to understand that we might have multi module projects in the future, this this solution should be capable of doing the same job for those projects.

2. Please add a description of what each file here is responsible for and complete flow description, with specifications of what exactly is counted. Details matter, so specifying if it counts all Kotlin code, or it will omit kotlin gradle files might be important for some cases.

Overall, seems it's possible to move this into a gitHub action which won't bloat the project. Contact me please when documentation is done so we can discuss this scenario.