Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts.nu

@@ -0,0 +1,9 @@
+source ~/.config/nushell/nu_scripts/modules/background_task/task.nu
+source ~/.config/nushell/nu_scripts/modules/nix/nix.nu
+use ~/.config/nushell/nu_scripts/modules/nvim/mod.nu [
+    tcd,
+    nvim-lua,
+    nve,
+    nvc,
+    nvs,
+]