Rename files and replace Hamler with Phi

[iho]

Add GitHub Actions CI workflow and extend language features

Add CI workflow with Elixir 1.16/OTP 26, update compile_all.exs to process stdlib and tests directories with .phi extension, implement binary literals, receive expressions, do-notation desugaring, atom/binary/as binders, improve codegen for unresolved names and constrained types, fix layout resolution for where/do/of/receive blocks, and update compiler error handling.

SUCCESS: tests/Test/System/IO.phi -> Test.System.IO
SUCCESS: tests/Test/System/Timer.phi -> Test.System.Timer
SUCCESS: tests/Test/Text/Json.phi -> Test.Text.Json
SUCCESS: tests/Test/Text/Parsec.phi -> Test.Text.Parsec
All modules compiled successfully!

Please, take a look at this PR and say what you think.