[nvim] Cleans up plugins, adds transparency.

home-manager/features/terminal.nix

@@ -60,7 +60,7 @@
       };
 
       colors = {
-        alpha = 0.8;
+        alpha = 0.9;
         # Tokionight Night theme
         # From https://codeberg.org/dnkl/foot/src/branch/master/themes/tokyonight-night
         background = "1a1b26";