Update aerospace keybinds, remove skhd, consolidate some theme scripts

ref/macos-system-settings.md

@@ -19,6 +19,18 @@ settings for manual configuration in macOS system settings app
     - display
         - reduce motion: enabled
         - reduce transparency: enabled
+- keyboard
+    - keyboard shortcuts
+        - screenshots
+            - save picture of selected area -> `cmd+shft+s`
+            - copy (clipboard) picture of selected area -> `ctrl+cmd+shft+s`
+        - modifier keys
+            - caps lock key -> `escape`
+            - command -> `control`
+            - alt/option -> `command`
+            - control -> `alt/option`
+        - spotlight
+            - show spotlight search -> `alt+r`
 
 and in general, just go through most pages/options and set them as desired