Add git config and several pkgs

I've added the config to symlink my dotfiles .git like I used to do with
stow.

git/.config/git/config

@@ -0,0 +1,12 @@
+[user]
+    name = J. Fernando Sánchez
+    email = j@sinpapel.es
+
+[core]
+    pager = delta
+
+[includeIf "gitdir:~/git/work/tcs/"]
+    path = tcs.config
+
+[delta]
+    side-by-side = true

git/.config/git/tcs.config

@@ -0,0 +1,3 @@
+[user]
+	name = J. Fernando Sánchez
+	email = f.sanchez@thechannelstore.tv

git/.gitconfig

@@ -1,10 +1,15 @@
 [user]
 	name = J. Fernando Sánchez
-	email = balkian@gmail.com
+	email = j@sanchezrada.es
+
 [diff]
-	tool = vimdiff
+	tool = delta
 [alias]
 	d = difftool
+
+[includeIf "gitdir:~/git/work/tcs"]
+    path = ~/.config/git/tcs.config
+
 [include]
  	path = ~/.gitconfig_secret