feat: Scoping rules and utilities for symbols, links and variables #2853

Job	Run time
Check for changes	5s
Build benchmarks 🏋️	2m 14s
check	38s
tests (Rust nightly, coverage)	3m 5s
tests (Rust 1.75)	2m 28s
tests (Rust beta)	1m 54s
tests (Rust stable, all features)	2m 41s
tests (Rust stable, no features)	2m 10s
tests hugr-llvm	0s
Check standard extensions	0s
Required checks 🦀	1s
	15m 16s

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