docs(close-button): replace consumer guide with migration planning docs

Author: TarunAdobe

2nd-gen/packages/swc/components/close-button/migration-guide.mdx

@@ -52,6 +52,8 @@
     - [Checkbox migration roadmap](checkbox/rendering-and-styling-migration-analysis.md)
 - Close Button
     - [Close button accessibility migration analysis](close-button/accessibility-migration-analysis.md)
+    - [Close button migration plan](close-button/migration-plan.md)
+    - [Close button migration roadmap](close-button/rendering-and-styling-migration-analysis.md)
 - Color Field
     - [Color field migration roadmap](color-field/rendering-and-styling-migration-analysis.md)
 - Color Loupe