Unsigned int support #7680

Job	Run time
Build LPython to WASM	7m 6s
LPython CI (3.10, windows-2025)	19m 37s
LPython CI (3.10, macos-latest)	6m 37s
LPython CI (3.10, ubuntu-latest)	10m 28s
Check Debug build	3m 29s
Check Release build	7m 25s
Test CPython Interop (@pythoncall)	3m 0s
Build Jupyter Kernel	4m 10s
Test PIP Installable Packages	2m 54s
Upload Tarball	49s
Run SymPy tests	3m 30s
Test LLVM 10	3m 30s
Test LLVM 15	3m 25s
Test LLVM 16	3m 28s
Run Integration tests with Python 3.10	4m 30s
Run Integration tests with Python 3.11	6m 27s
Run Integration tests with Python 3.9	3m 24s
Run Integration tests with Python 3.12	3m 38s
	1h 37m 27s

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