Exclude legacy-theme/ts/colors from published package (#7144)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: siddharthkp <1863771+siddharthkp@users.noreply.github.com>
Co-authored-by: Siddharth Kshetrapal <siddharthkp@github.com>

Author: Copilot

packages/react/package.json

@@ -63,6 +63,7 @@
   ],
   "files": [
     "dist",
+    "!dist/legacy-theme/ts/colors",
     "generated",
     "CHANGELOG.md"
   ],