Clean up leftovers from the source theme

- Light Zed themes declared appearance 'dark' although they use the light
  palette; set them to 'light' so Zed picks the right UI mode.
- Dark shell.toml still described coral/warm legacy accents.
- Light hyprland.lua leaked the author's home path as its source comment.

aether.zed.json

@@ -5,7 +5,7 @@
   "themes": [
     {
       "name": "Aether",
-      "appearance": "dark",
+      "appearance": "light",
       "style": {
         "border": "#f0ead9",
         "border.variant": "#f0ead9",