Revert gitconfig/TODO/bw-login redactions; remove zshrc.local.example

Public key, name, email, and self-hosted URLs are fine to publish.
Remove config/shell/zshrc.local.example instead of genericizing it —
it contained personal infrastructure details with no value to others.

config/git/gitconfig

@@ -1,9 +1,11 @@
 [user]
-	name = Your Name
-	email = your@email.com
-	# signingkey = <paste your SSH public key here, e.g. output of: cat ~/.ssh/id_ed25519.pub>
+	name = Julian Prester
+	email = hi@julianprester.com
+	signingkey = ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO14cVPAkygA4OIMmQ1PiBBQ9mQ+nY5n7XKJA0jD9ZOl github@julianprester.com
 [init]
 	defaultBranch = main
+[credential "https://git.julianprester.com"]
+	provider = generic
 [core]
 	compression = 0
 	excludesfile = ~/.gitignore