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

Per ADR-0045 (three-tier library naming) the launcher migrates from
the retired lib-sporel.* prefix to the new lib-management.* tier for
host-infrastructure libs. Updates:

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

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

README.md

@@ -1,9 +1,9 @@
-# lib-sporel.launcher
+# lib-management.launcher
 
-Module-discovery and module-switch entry. Lists available modules from the configured modules-dir and launches the selected one via `engine.switch_module`. Typical entry point: `--module=lib-sporel.launcher` boots into a chooser screen rather than directly into a game.
+Module-discovery and module-switch entry. Lists available modules from the configured modules-dir and launches the selected one via `engine.switch_module`. Typical entry point: `--module=lib-management.launcher` boots into a chooser screen rather than directly into a game.
 
 **Version:** 0.1.0  
-**Module-ID:** lib-sporel.launcher  
+**Module-ID:** lib-management.launcher  
 **Requires:** lib-core.input v>=0.4.0  
 **Tags:** launcher, menu, system, navigation
 
@@ -12,7 +12,7 @@ Module-discovery and module-switch entry. Lists available modules from the confi
 <!-- topology:start (auto-generated; do not edit) -->
 ```mermaid
 graph LR
-  this["lib-sporel.launcher"]
+  this["lib-management.launcher"]
   lib_core_input["lib-core.input"]
   this --> lib_core_input
   engine["engine.*"]