TailwindCSS 4 Migration update

Author: Paul-Bob

docs/3.0/tailwind-4-migration.md

@@ -7,7 +7,32 @@ Thank you!
 
 ## You don't have a TailwindCSS pipeline
 
-[WIP]
+:::warning 🚧 This guide is still in progress, but here are the basics in order to test TailwindCSS 4.
+:::
+
+To test TailwindCSS 4, ensure you are using the following versions:
+
+If you're utilizing `avo-rhino_field`, you must lock its version to `0.0.12.tw4`.
+
+```ruby
+gem "avo-rhino_field", "0.0.12.tw4"
+```
+
+Add the appropriate entry to your `Gemfile`, depending on your tier:
+```ruby
+# Avo Community
+gem "avo", "3.17.5.tw4"
+
+# Avo Pro
+gem "avo", "3.17.5.tw4"
+gem "avo-pro", "3.17.5.tw4", source: "https://packager.dev/avo-hq/"
+
+# Avo Advanced
+gem "avo", "3.17.5.tw4"
+gem "avo-advanced", "3.17.5.tw4", source: "https://packager.dev/avo-hq/"
+```
+
+To report any issue please use [this PR](https://github.com/avo-hq/avo/pull/3632).
 
 ## You do have a TailwindCSS pipeline