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/hg/hgrc

@@ -0,0 +1,17 @@
+# example user config (see 'hg help config' for more info)
+[ui]
+# name and email, e.g.
+username = Cian Hughes <chughes000@gmail.com>
+
+# We recommend enabling tweakdefaults to get slight improvements to
+# the UI over time. Make sure to set HGPLAIN in the environment when
+# writing scripts!
+tweakdefaults = True
+
+[extensions]
+# uncomment the lines below to enable some popular extensions
+# (see 'hg help extensions' for more info)
+#
+# histedit =
+# rebase =
+# uncommit =