chore(main): release 0.20.0

[hugrbot]

🤖 I have created a release beep boop

0.20.0 (2025-06-12)

⚠ BREAKING CHANGES

• Explicit GuppyModule declarations are no longer possible. Instead, use the regular @guppy decorator everywhere without passing an explicit module. Compilation is now triggered via the guppy.compile function, passing the to-be-compiled function as an argument.

Features

• with_owned std library function to temporarily take ownership of a borrowed value (#994) (7bf75df), closes #992
• Add Either type to the standard library (#993) (75c1804), closes #991
• Add optional signature argument to RawCustomFunctionDef (#1005) (79e2d5b), closes #1003
• Add PriorityQueue to standard library (#1006) (4e609f0)
• Allow users to wrap guppy in their own decorator (#1017) (f047c9b)
• Comptime nat arguments (#1015) (d2a9a07)
• Function overloading via static dispatch (#1000) (6f523d6)
• Remove explicit Guppy modules (#983) (0b2e652)

Bug Fixes

• deterministic worklist iteration order (#1025) (effa51b), closes #1024

Documentation

• remove wrappers on random docs, add doc to get_current_shot (#1001) (4de4ef2)

---

This PR was generated with Release Please. See documentation.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.33%. Comparing base (79e2d5b) to head (4ebe1fa).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #996   +/-   ##
=======================================
  Coverage   92.33%   92.33%           
=======================================
  Files         103      103           
  Lines       10185    10185           
=======================================
  Hits         9404     9404           
  Misses        781      781           

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