neovim lsp refactor

remove null-ls (archived, deprecated)
replace formatting with conform.nvim
replace diagnostics with nvim-lint
fixed issue where overlay neovim plugins weren't being applied

modules/nixos/system/user.nix

@@ -1,4 +1,4 @@
-{ config, lib, ... }: {
+{ config, pkgs, lib, ... }: {
 
   options = {
 
@@ -31,11 +31,22 @@
 
     };
 
+    # Allow writing custom scripts outside of Nix
+    # Probably shouldn't make this a habit
+    environment.localBinInPath = true;
+
     home-manager.users.${config.user}.xdg = {
 
       # Allow Nix to manage the default applications list
       mimeApps.enable = true;
 
+      # Create a desktop option for Burp
+      desktopEntries.burp = lib.mkIf pkgs.stdenv.isLinux {
+        name = "Burp";
+        exec = "${config.homePath}/.local/bin/burp.sh";
+        categories = [ "Application" ];
+      };
+
       # Set directories for application defaults
       userDirs = {
         enable = true;