Polish README and update state JSONs

.context.json

@@ -10,14 +10,9 @@
     "main": {
       "notes": [
         "Shared PS1 module in dotfiles/ps1/ps1.sh is source of truth for both Linux and macOS installers.",
-        "README documents 4seasons branch, seasonal ranges, static/dynamic choice.",
+        "README documents seasonal ranges and style packs.",
         "README example image uses images/bash-pallete.png."
       ]
-    },
-    "dev": {
-      "notes": [
-        "Development branch; currently in sync with main."
-      ]
     }
   },
   "files": {