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/stdlib-candidate/tests/mod.nu

@@ -0,0 +1,9 @@
+export module bulk-rename.nu
+export module record.nu
+export module str_xpend.nu
+export module math.nu
+export module bench.nu
+export module script-parsing.nu
+export module str_dedent.nu
+export module conversions.nu
+export module tables.nu