Move legacy primer/primitives into Primer React (#3787)

* move legacy primitives to prc

* use es modules

* cleanup

* lint

* just get rid of typography sheesh

* readme

* move to ts

* more ts

* fix import

* feedback

* delete d.ts file

* add codeowner

* add new tokens

* ts directory

* test(vrt): update snapshots

* Create dry-bugs-act.md

* Update src/theme.ts

Co-authored-by: Josh Black <joshblack@github.com>

* Update CODEOWNERS

Co-authored-by: Josh Black <joshblack@github.com>

* lint

* fix inactive button color

* fix inactive for real

* test(vrt): update snapshots

---------

Co-authored-by: langermank <langermank@users.noreply.github.com>
Co-authored-by: Josh Black <joshblack@github.com>

.changeset/dry-bugs-act.md

@@ -0,0 +1,7 @@
+---
+"@primer/react": minor
+---
+
+- Moves legacy color primitives from `primer/primitives` directly into Primer React
+- Cleans up unused dependencies on primitives other than color
+- Preparing for the upgrade to CSS variables (Primitives v8)

CODEOWNERS

@@ -1,2 +1,3 @@
 # All changes should be reviewed by a member of the @react-reviewers team
 * @primer/react-reviewers
+./src/legacy-theme/ @langermank

src/legacy-theme/README.md

@@ -0,0 +1 @@
+`legacy-theme` is a copy of the colors `dist` from `primer/primitives` and is intended to serve as a stopgap until we migrate JS variables to CSS variables. This excludes the build logic from Primitives, so each value is a raw hex. Refrain from making changes to these colors unless absolutely necessary.