[v0.2] Cut Wright over to workshop-rs

[Teakowa]

Workshop dependency: workshop-rs#2
Release coordination: #135

Goal

Make workshop-rs the single canonical Workshop implementation consumed by Wright and remove duplicate Workshop semantic ownership from this repository.

Scope

• Replace Wright-owned canonical Workshop parser/catalog/emitter/WIR implementation dependencies with the exported workshop-rs surface.
• Move or adapt WIR ownership so canonical Workshop semantic types no longer live in a source-language/Wright-owned mixed IR boundary.
• Update analyzer, driver, conversion, diagnostics, language-service, tests, fixtures, and distribution code to consume workshop-rs where Workshop semantics are required.
• Preserve existing Wright user-visible compile/check/lint/analyze/inspect/convert behavior during cutover.
• Remove duplicate canonical Workshop catalog/parser/emitter/validation code once callers are migrated.
• A temporary compatibility crate/module may only re-export or adapt workshop-rs; it must not remain a second semantic implementation.
• Pin/document the consumed workshop-rs version/commit during the pre-release migration.

Non-goals

• Moving Wright lint, agent, LSP, or orchestration responsibilities into workshop-rs.
• Full OPY/DEL provider extraction.
• Expanding Workshop syntax/catalog beyond what workshop-rs declares as part of this cutover.
• Maintaining two canonical Workshop implementations for compatibility convenience.

Acceptance criteria

• Wright's production dependency graph consumes workshop-rs for canonical Workshop semantics.
• No second canonical Workshop parser/catalog/emitter/WIR implementation remains active in Wright.
• Existing declared Wright workflows remain regression-green against the cutover.
• Compatibility shims, if any, contain no independent semantic implementation and have an explicit removal path.
• Dependency direction remains wright -> workshop-rs; workshop-rs does not depend on Wright tooling crates.