Add Go project scaffold (task 352)

- go.mod with module codeberg.org/snonux/geheim (go 1.22, mage dep)
- Magefile.go with Build, Test, Install, Uninstall targets
- cmd/geheim/main.go delegating to internal/cli
- Stub packages: cli, version, config, crypto, git, store, clipboard, shell
- go.sum generated; binary confirmed to build via mage build

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/cmd/geheim/main.go b/cmd/geheim/main.go
new file mode 100644
index 0000000..4032f53
--- /dev/null
+++ b/cmd/geheim/main.go
@@ -0,0 +1,13 @@
+// main is the entry point for the geheim binary.
+// It delegates all logic to the cli package and exits with the returned code.
+package main
+
+import (
+	"os"
+
+	"codeberg.org/snonux/geheim/internal/cli"
+)
+
+func main() {
+	os.Exit(cli.Run())
+}