feat: implement OAuth login functionality

- Update environment configuration and gitignore
- Replace sensitive example with actual config file
- Refactor LLM prompt structure by removing login/session modules
- Update main application entry point for OAuth integration

.sensitive.json

@@ -0,0 +1,22 @@
+{
+    "google.com": {
+        "x_username": "whs.imnya.ng@gmail.com",
+        "x_password": "Vb1Mz9pgjY8JVs"
+    },
+    "accounts.google.com": {
+        "x_username": "whs.imnya.ng@gmail.com",
+        "x_password": "Vb1Mz9pgjY8JVs"
+    },
+    "naver.com": {
+        "x_username": "oauth-j93es",
+        "x_password": "whs31234"
+    },
+    "nid.naver.com": {
+        "x_username": "oauth-j93es",
+        "x_password": "whs31234"
+    },
+    "github.com": {
+        "x_username": "imnyang-bot",
+        "x_password": "6PuVXCH9tpQLNm"
+    }
+}