lots of changes

- changed music command
- added music to backup
- showmethekey more window rules
- added mpv config
- added seahorse to all reqs
- nvim
    - added render markdown
    - added treesitter. ive been using just my systems treesitter.
    - fixed undotree bind
    - removed eldritch theme. it broke

env/.config/nvim/after/plugin/undotree.lua

@@ -1,4 +1 @@
-local ok, _ = pcall(require, 'undotree')
-if ok then
-    vim.keymap.set("n", "<leader>u", vim.cmd.UndotreeToggle)
-end
+vim.keymap.set("n", "<leader>u", ":UndotreeToggle<CR>")