doc: update readme with developer tools setting #7737

Job	Run time
Check Debug build	4m 56s
Build LPython to WASM	7m 19s
Test PIP Installable Packages	4m 15s
Run Integration tests with Python 3.12	6m 5s
Run SymPy tests	5m 16s
Test LLVM 10	5m 9s
Run Integration tests with Python 3.11	5m 44s
Run Integration tests with Python 3.9	5m 42s
LPython CI (3.10, windows-2025)	18m 42s
Check Release build	8m 41s
Test CPython Interop (@pythoncall)	4m 22s
Test LLVM 16	5m 3s
Test LLVM 15	5m 2s
LPython CI (3.10, ubuntu-latest)	11m 18s
LPython CI (3.10, macos-latest)	7m 15s
Run Integration tests with Python 3.10	4m 50s
Build Jupyter Kernel	4m 11s
Upload Tarball	53s
	1h 54m 43s

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