chore(readme): header updates

* Update header colors
* Link header to high-res art
* Add phorm badge

README.md

@@ -1,10 +1,11 @@
 # Bubble Tea
 
 <p>
-    <img src="https://stuff.charm.sh/bubbletea/bubbletea-github-header-simple.png" width="313" alt="Bubble Tea Title Treatment"><br>
+    <a href="https://stuff.charm.sh/bubbletea/bubbletea-4k.png"><img src="https://github.com/charmbracelet/bubbletea/assets/25087/108d4fdb-d554-4910-abed-2a5f5586a60e" width="313" alt="Bubble Tea Title Treatment"></a><br>
     <a href="https://github.com/charmbracelet/bubbletea/releases"><img src="https://img.shields.io/github/release/charmbracelet/bubbletea.svg" alt="Latest Release"></a>
     <a href="https://pkg.go.dev/github.com/charmbracelet/bubbletea?tab=doc"><img src="https://godoc.org/github.com/golang/gddo?status.svg" alt="GoDoc"></a>
     <a href="https://github.com/charmbracelet/bubbletea/actions"><img src="https://github.com/charmbracelet/bubbletea/workflows/build/badge.svg" alt="Build Status"></a>
+    <a href="https://www.phorm.ai/query?projectId=a0e324b6-b706-4546-b951-6671ea60c13f"><img src="https://stuff.charm.sh/misc/phorm-badge.svg" alt="phorm.ai"></a>
 </p>
 
 The fun, functional and stateful way to build terminal apps. A Go framework