chore(changeset): add tailwindcss-patch v9 release note

Author: sonofmagic

.changeset/real-otters-boil.md

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+---
+"tailwindcss-patch": major
+---
+
+Finalize the v9 `tailwindcss-patch` upgrade:
+
+- require the modern `TailwindcssPatcher` option shape and reject legacy constructor aliases
+- require explicit `tailwindcss.version` and validate it against the resolved Tailwind package version
+- reject legacy workspace registry aliases such as `registry.output`, `registry.tailwind`, and `registry.patch`
+- default generated config to `registry.tailwindcss.version = 4`
+- document the v8 -> v9 migration path and modern-only configuration model