hugr: v0.6.0

Bug Fixes

• SimpleReplacement panic on multiports (#1191)
• Add some validation for const nodes (#1222)
• Cfg not validating entry/exit types (#1229)
• extract_hugr not removing root node ports (#1239)

Documentation

• Fix documentation of ValidationError::ConstTypeError (#1227)

Features

• CircuitBuilder::add_constant (#1168)
• [breaking] Make the rewrite errors more useful (#1174)
• [breaking] Validate Extensions using hierarchy, ignore input_extensions, RIP inference (#1142)
• [breaking] Infer extension deltas for Case, Cfg, Conditional, DataflowBlock, Dfg, TailLoop (#1195)
• Helper functions for requesting inference, use with builder in tests (#1219)

Refactor

• [breaking] FunctionBuilder takes impl Into (#1220)
• [breaking] Remove NodeType and input_extensions (#1183)