Cleanup internal, vendors, cleanup cmd/*

Introduces /pkg for non-intenral packages

pkg/cli/context.go

@@ -0,0 +1,16 @@
+package cli
+
+import (
+	"context"
+
+	ctxwrap "github.com/SentimensRG/ctx"
+	"github.com/SentimensRG/ctx/sigctx"
+)
+
+// Context is  small wrapper that returns sig-term bound context
+//
+// This can be used as (proper) background context that properly terminates
+// all subroutines.
+func Context() context.Context {
+	return ctxwrap.AsContext(sigctx.New())
+}