doc: update readme with developer tools setting #7686

Job	Run time
LPython CI (3.10, ubuntu-latest)	10m 28s
Check Debug build	3m 28s
LPython CI (3.10, windows-2025)	16m 56s
Build LPython to WASM	7m 9s
Test PIP Installable Packages	2m 53s
Run Integration tests with Python 3.9	4m 2s
Run SymPy tests	4m 42s
Test CPython Interop (@pythoncall)	2m 55s
Test LLVM 16	3m 29s
Check Release build	6m 54s
Run Integration tests with Python 3.10	4m 9s
Build Jupyter Kernel	4m 11s
Test LLVM 15	3m 27s
Test LLVM 10	3m 18s
Run Integration tests with Python 3.11	4m 16s
Run Integration tests with Python 3.12	3m 26s
Upload Tarball	50s
LPython CI (3.10, macos-latest)	8m 34s
	1h 35m 7s

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