chore!: Update hugr 0.15, portgraph 0.13.1, and petgraph 0.7.1

[aborgna-q]

Currently waiting for the package releases.

Requires the fix in CQCL/portgraph#178.

BREAKING CHANGE: Bumped hugr dependency to 0.15

[hugrbot]

This PR contains breaking changes to the public Rust API.

cargo-semver-checks summary

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.30%. Comparing base (b5f5669) to head (9835d28).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #753      +/-   ##
==========================================
- Coverage   82.31%   82.30%   -0.01%     
==========================================
  Files          63       63              
  Lines        7740     7733       -7     
  Branches     7484     7477       -7     
==========================================
- Hits         6371     6365       -6     
  Misses        979      979              
+ Partials      390      389       -1     

Flag	Coverage Δ
python	82.42% <ø> (ø)
rust	82.30% <ø> (-0.01%)	⬇️

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