docs: add CLI command reference and update key docs to use bin/console

New docs/reference-cli-commands.md covers all commands, bootstrap helpers,
and how to add new commands. Updated lokale-entwicklung, entwickler-checkliste,
betriebscheck-doctor, index, and web/index.php error message to reference
bin/console instead of legacy bin/*.php scripts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/index.php

@@ -32,7 +32,7 @@ setAppContainer($container);
 // ── 2. Module runtime validation ────────────────────────────────────
 // Fail-fast if the runtime page root is stale (modules changed without
 // running module-runtime-sync). No auto-build in the request path —
-// that is the responsibility of bin/module-runtime-sync.php.
+// that is the responsibility of `php bin/console module:sync`.
 
 $moduleRegistry = app(ModuleRegistry::class);
 $runtimePageRoot = __DIR__ . '/../storage/runtime/pages';
@@ -44,7 +44,7 @@ if (count($activeModules) > 0 || is_dir($runtimePageRoot) || is_link($runtimePag
     if ($expectedFingerprint !== $actualFingerprint) {
         throw new RuntimeException(
             "Module runtime is stale (expected: '{$expectedFingerprint}', actual: '{$actualFingerprint}'). "
-            . 'Run: php bin/module-runtime-sync.php'
+            . 'Run: php bin/console module:sync'
         );
     }
     if (is_dir($runtimePageRoot) || is_link($runtimePageRoot)) {