PHLEGM v8 - Checkpoint 19 - Python-Free Developer Distribution

- Removed four historical .py validators from tools/; no Python is part of the shipping toolchain.
- Build-architecture gate now rejects .py, .pyc, .pyo files anywhere in the project tree.
- PowerShell / FreeBASIC verification remains in place. The text-newline validator no longer treats .py as a supported project source extension.
- Preserved Checkpoint 18 bootstrap archive-resolver layout and Checkpoint 17 CFG cloning logic unchanged.
- The reported Checkpoint 18 build failure was an LF-only Python validator; removing the unsupported file corrects the immediate input problem.
- Native Windows compilation and full emulator runtime checks still need hands-on validation.
