chore: upgrade to L9

BREAKING CHANGE: This commit updates the Laravel framework to version 9. Additionally, it also updates outdated and abandoned dependencies in the composer.json file.

The resources/lang directory has also been moved to the repository's root directory.

lang/vendor/log-viewer/ko.json

@@ -0,0 +1,13 @@
+{
+    "Date": "날짜",
+    "The list of logs is empty!": "로그가 없습니다.",
+    "All": "전체",
+    "Emergency": "긴급",
+    "Alert": "경고",
+    "Critical": "심각",
+    "Error": "오류",
+    "Warning": "주의",
+    "Notice": "알림",
+    "Info": "정보",
+    "Debug": "디버그"
+}