fix(create_project): drop defunct hyperguild new-project from finalize guidance (#46)

The infra#179 partial_failure message and the tool descriptor told callers to
"Finalize locally with `hyperguild new-project`" — but that command does not
exist (the hyperguild CLI only has tier/brain/mode; it was specced, never built).
It pointed users at a dead end.

Extracted the message into a pure infra179FinalizeMessage() and reworded it to
name the actual remaining work — cloning the repo and substituting the leftover
__PROJECT_NAME__ / __MODULE_PATH__ placeholders, or retrying — with no reference
to any scaffolding CLI. Descriptor updated to match. Unit-tested the wording.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tools/create_project_internal_test.go

@@ -0,0 +1,22 @@
+package tools
+
+import (
+	"strings"
+	"testing"
+)
+
+// #46: the infra#179 finalize guidance must not point at a non-existent command
+// (`hyperguild new-project` was never built). It should name the real remaining
+// work — substituting the placeholders — so the caller isn't sent to a dead end.
+func TestInfra179FinalizeMessage(t *testing.T) {
+	msg := infra179FinalizeMessage("main", 5, 2, "branch does not exist")
+
+	for _, want := range []string{"infra#179", "__PROJECT_NAME__", "__MODULE_PATH__", "branch does not exist"} {
+		if !strings.Contains(msg, want) {
+			t.Errorf("message missing %q\ngot: %s", want, msg)
+		}
+	}
+	if strings.Contains(msg, "hyperguild new-project") {
+		t.Errorf("message must not reference the defunct `hyperguild new-project` command\ngot: %s", msg)
+	}
+}