fish scripts update

changelog:
- refactored fzf scripts
- nullify unused\remapped fzf bindings
- `list-op.fish` hotfix 3
- added `hexyl` package to the system

home/.config/fish/functions/switch-preview.fish

@@ -0,0 +1,20 @@
+function switch-preview
+    set path "$argv[1]"
+
+    if test -f "$path"
+        if test ! -s "$path"
+            echo "File is empty"
+        else
+            archive-preview "$path"
+            if string match -q "image/*" (file -b --mime-type "$path")
+                image-preview "$path"
+            else
+                file-preview "$path"
+            end
+        end
+    else if test -d "$path"
+        dir-preview "$path"
+    else
+        echo "Preview unavailable"
+    end
+end