implemented most of the pixiv scraper

src/scraper/pinterest.py

@@ -0,0 +1,10 @@
+from psycopg2._psycopg import connection
+
+import db.pictures as db
+from api.models import Account, Picture
+
+
+def pinterest(conn: connection, account: Account):
+    picture = Picture(external_id = "1", url = "", metadata = {})
+    picture_id = db.create_picture(conn, "pinterest", picture.external_id, picture.url, picture.metadata)
+    return picture_id