config(git,claude,ssh): templated gitconfig; claude settings/commands/hooks/skills; ssh config

gitconfig: name/email from chezmoi data, gh credential helper by PATH
lookup (portable to darwin). claude: no credentials, history, projects,
sessions, or plugin caches. ssh config as private_ (0600).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

private_dot_ssh/private_config

@@ -0,0 +1,15 @@
+# known_hosts
+Host github
+  HostName github.com
+
+Host goliath
+  HostName 192.168.1.68
+  User prad
+  SetEnv TERM=xterm-256color
+  ControlMaster auto
+  ControlPath ~/.ssh/cm-%r@%h:%p
+  ControlPersist 10m
+
+Host kvm8-prod
+  HostName walletbase.host
+  User root