feat: Removing nvim-lspconfig and starting the removal of Mason, adding

in LSP definitions for servers that are used, adding in a script to
check for LSPs, removing some extraneous items in the tmux conf, moving
autopairs to its own file

nvim/after/lsp/shellcheck.lua

@@ -0,0 +1,4 @@
+return {
+    cmd = { 'shellcheck' },
+    filetypes = { 'zsh', 'bash', 'sh' },
+}