small improvements & security update

changelog:
- added additional commands for nixos `gc` in fish
- changed default app to `mpv` for gif images in mimeapps.list
- added config for clamav-scanner
- added `fangfrisch` to clamav
- sandboxed some apps & added profiles through firejail
- changed vscode to vscodium
- updated README

home/.config/wezterm/wezterm.lua

@@ -2,6 +2,7 @@ local wezterm = require 'wezterm'
 local act = wezterm.action
 
 return {
+  enable_wayland = true;
   color_scheme = 'Catppuccin Macchiato',
   enable_tab_bar = false,
   inactive_pane_hsb = {
@@ -153,4 +154,4 @@ return {
       action = act.ClearSelection
     },
   },
-}
+}