fix: copy-on-wrap commands and typed errors

Clone commands before wrapping Before hooks, export ErrLifecycleNotInContext
and ErrNoDependencies, add Run helper, split command.go and deps.go.

Co-authored-by: Cursor <cursoragent@cursor.com>

doc.go

@@ -0,0 +1,7 @@
+// Package appcli connects [github.com/urfave/cli/v3] commands to
+// [gitea.auvem.com/go-toolkit/app.Lifecycle] dependency loading.
+//
+// Inject the lifecycle into context in main (see [appcli.Run]), wrap commands with
+// [appcli.NewCommand] or [appcli.NewRootCommand], and supply [appcli.DepFn] callbacks
+// that return modules to initialize before each command runs.
+package appcli