Unsigned int support #7672

Job	Run time
Build LPython to WASM	3m 45s
LPython CI (3.10, macos-latest)	5m 56s
LPython CI (3.10, windows-2025)	15m 26s
LPython CI (3.10, ubuntu-latest)	8m 54s
Check Debug build	3m 53s
Build Jupyter Kernel	3m 47s
Test CPython Interop (@pythoncall)	3m 51s
Test PIP Installable Packages	3m 51s
Run Integration tests with Python 3.10	4m 35s
Run Integration tests with Python 3.9	4m 1s
Run Integration tests with Python 3.12	5m 11s
Check Release build	7m 35s
Run Integration tests with Python 3.11	4m 53s
Test LLVM 15	3m 43s
Run SymPy tests	5m 7s
Upload Tarball	50s
Test LLVM 16	3m 44s
Test LLVM 10	3m 46s
	1h 32m 48s

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