Configure iPhone Git commit identity (#76)

docs/configuration.md

@@ -33,6 +33,10 @@ clipboard_timeout_seconds = 45
 [security]
 inactivity_timeout_seconds = 120
 
+[git]
+user_name = "Alice Example"
+user_email = "alice@example.test"
+
 [[git.remotes]]
 name = "origin"
 url = "https://git.example.test/alice/password-store.git"
@@ -49,6 +53,10 @@ Commands are split into an executable and argument vector and are never passed
 through a shell. Only the CLI `edit` adapter may eventually launch this
 configured editor.
 
+`git.user_name` and `git.user_email` set the author for commits created by
+IronStorage. Both must be present together and cannot contain line breaks or
+angle brackets. The built-in IronStorage identity is used when both are absent.
+
 Git remotes are HTTPS-only. URLs containing user information, passwords,
 queries, or fragments are rejected. `server_id` and `application_id` are opaque
 references used to retrieve credentials from the operating-system secret