DTSERWONE-887 - Generate documentation

[grmeyer-hw-dev]

Update iOS Core Api Documentation by Github Action

Changes

• Push the updated documentation to gh-pages branch
• Trigger GitHub Action only on merging PR on master
• Install LLVM to fix the generation of the code coverage report
• Remove the Makefile, all instructions was migrated to Github action for clarity.

Test

Fix build and generate documentation by Github Action

https://github.com/hyperwallet/hyperwallet-ios-ui-sdk/actions

Update documentation branch via Github Action

Updated documentation