Unsigned int support #7678

Job	Run time
Test PIP Installable Packages	3m 57s
LPython CI (3.10, macos-latest)	8m 42s
Check Debug build	4m 41s
LPython CI (3.10, windows-2025)	18m 6s
Build LPython to WASM	7m 4s
LPython CI (3.10, ubuntu-latest)	10m 23s
Upload Tarball	48s
Check Release build	8m 14s
Run SymPy tests	5m 16s
Run Integration tests with Python 3.9	5m 30s
Run Integration tests with Python 3.10	4m 32s
Run Integration tests with Python 3.12	5m 32s
Run Integration tests with Python 3.11	4m 32s
Test CPython Interop (@pythoncall)	4m 16s
Test LLVM 15	4m 37s
Test LLVM 10	4m 25s
Test LLVM 16	4m 32s
Build Jupyter Kernel	4m 11s
	1h 49m 18s

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