Refactor pre-commit hooks to use prek (#976)

* ci: change to prek for pre-commit

* refactor: fix shellcheck warnings for the scripts

* chore: unify whitespace formatting

* nix: add prek to dev shell

quickshell/assets/dank.svg

@@ -7,7 +7,7 @@
   <rect x="92" y="5" width="8" height="6" fill="white"/>
   <rect x="104" y="5" width="8" height="6" fill="white"/>
   <rect x="124" y="5" width="8" height="6" fill="white"/>
-  
+
   <!-- Row 1 -->
   <rect x="0" y="11" width="8" height="6" fill="white"/>
   <rect x="20" y="11" width="8" height="6" fill="white"/>
@@ -17,7 +17,7 @@
   <rect x="92" y="11" width="8" height="6" fill="white"/>
   <rect x="104" y="11" width="8" height="6" fill="white"/>
   <rect x="120" y="11" width="8" height="6" fill="white"/>
-  
+
   <!-- Row 2 -->
   <rect x="0" y="17" width="8" height="6" fill="white"/>
   <rect x="20" y="17" width="8" height="6" fill="white"/>
@@ -26,7 +26,7 @@
   <rect x="76" y="17" width="8" height="6" fill="white"/>
   <rect x="92" y="17" width="8" height="6" fill="white"/>
   <rect x="104" y="17" width="20" height="6" fill="white"/>
-  
+
   <!-- Row 3 -->
   <rect x="0" y="23" width="8" height="6" fill="white"/>
   <rect x="20" y="23" width="8" height="6" fill="white"/>
@@ -37,7 +37,7 @@
   <rect x="92" y="23" width="8" height="6" fill="white"/>
   <rect x="104" y="23" width="8" height="6" fill="white"/>
   <rect x="120" y="23" width="8" height="6" fill="white"/>
-  
+
   <!-- Row 4 -->
   <rect x="0" y="29" width="24" height="6" fill="white"/>
   <rect x="32" y="29" width="8" height="6" fill="white"/>
@@ -46,4 +46,4 @@
   <rect x="84" y="29" width="16" height="6" fill="white"/>
   <rect x="104" y="29" width="8" height="6" fill="white"/>
   <rect x="124" y="29" width="8" height="6" fill="white"/>
-</svg>
+</svg>