feat!: require Shopware 6.7, release as 0.1.0

- shopware/core ~6.7.0; 6.6 stays on the 0.0.x line
- drop the sw-settings navigation entry; the settingsItem card in
  Settings > System is the only entry, like core settings modules
- dev container on dockware/shopware:6.7.14.2

BREAKING CHANGE: Shopware 6.6 is no longer supported.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

composer.json

@@ -3,7 +3,7 @@
     "description": "Export database dumps for Shopware 6 environments.",
     "type": "shopware-platform-plugin",
     "license": "MIT",
-    "version": "0.0.6",
+    "version": "0.1.0",
     "keywords": [
         "shopware",
         "shopware6",
@@ -26,7 +26,7 @@
     },
     "require": {
         "php": "^8.2",
-        "shopware/core": "~6.6.0"
+        "shopware/core": "~6.7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.0"