rename to lib-management.launcher-test (was lib-sporel.launcher-test)

Per ADR-0045 (three-tier library naming) the launcher-test migrates
from the retired lib-sporel.* prefix to the new lib-management.* tier.

- manifest.lib id: lib-sporel.launcher-test -> lib-management.launcher-test
- manifest.core id: lib-sporel.launcher-test.core -> lib-management.launcher-test.core
- init.lua engine.module.dir_of("lib-management.launcher-test")
- README + fsm.lua + init.lua comments updated

Gitea repo renamed in lockstep:
sporel/sporel-lib-sporel.launcher-test ->
sporel/sporel-lib-management.launcher-test

manifest.core

@@ -1,5 +1,5 @@
 {
-    "id": "lib-sporel.launcher-test.core",
+    "id": "lib-management.launcher-test.core",
     "kind": "lib",
     "version": "0.1.0",
     "license": "Proprietary"