test(deps): update dependency copier to v9.12.0 (main)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
copier	9.11.3 → 9.12.0

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Release Notes

copier-org/copier (copier)

v9.12.0

Compare Source

Feat

• add new settings API with minimal surface
• re-export Phase enum at package level

Fix

• updating: apply skip-if-exists patterns as gitignore-style at subproject root in
  update algorithm
• updating: anchor removed file paths to project root in update algorithm
• updating: normalize user-deleted paths before skip-if-exists pattern matching
  during updates

Refactor

• typing: use builtin types in public API signatures
• deprecate public settings module and its symbols
• replace **kwargs with explicit parameters in run_{copy,recopy,update} functions

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