feat(cli): added warning about ignoring --project when trying to appl…

…y `new` command

src/poetry/console/commands/new.py

@@ -34,6 +34,13 @@ def handle(self) -> int:
         from poetry.layouts import layout
         from poetry.utils.env import SystemEnv
 
+        if self.io.input.option("project"):
+            self.line_error(
+                "<warning>--project can only be used on existing projects. Poetry will"
+                " ignore this option. Use --path instead to define the path to create"
+                " the project at.</warning>"
+            )
+
         if self.option("src"):
             layout_cls = layout("src")
         else: