doc: update readme with developer tools setting #7685

Job	Run time
LPython CI (3.10, windows-2025)	22m 44s
LPython CI (3.10, ubuntu-latest)	11m 27s
Build LPython to WASM	7m 38s
LPython CI (3.10, macos-latest)	8m 10s
Test PIP Installable Packages	4m 20s
Check Debug build	3m 27s
Test LLVM 10	3m 30s
Test LLVM 15	3m 36s
Run SymPy tests	5m 19s
Check Release build	8m 40s
Build Jupyter Kernel	4m 6s
Run Integration tests with Python 3.10	3m 33s
Upload Tarball	50s
Run Integration tests with Python 3.9	3m 25s
Run Integration tests with Python 3.11	5m 9s
Test LLVM 16	3m 22s
Test CPython Interop (@pythoncall)	3m 12s
Run Integration tests with Python 3.12	3m 16s
	1h 45m 44s

Provide feedback