Add missing dependencies

The extension uses TYPO3 core extbase and fluid extensions.
Therefore they should be part of the require.
Otherwise a composer install will lead to an incomplete system setup for
development.

Also add generated files / folders to .gitignore.
Otherwise they might end up in git.

Relates: #8092

.gitignore

@@ -1 +1,3 @@
+/composer.lock
+/public/
 /vendor/

composer.json

@@ -9,7 +9,9 @@
         }
     ],
     "require": {
-        "typo3/cms-core": "^10.4"
+        "typo3/cms-core": "^10.4",
+        "typo3/cms-extbase": "^10.4",
+        "typo3/cms-fluid": "^10.4"
     },
     "autoload": {
         "psr-4": {