fix(neovim): Blank to default lsp configurations

- Configuration for files under `/lsp` are added

common/.config/nvim/lsp/shfmt.lua

@@ -1 +1,4 @@
-return {}
+return {
+    cmd = { "shfmt", "-l", "-" },
+    filetypes = { "sh", "bash", "zsh" },
+}