add "experimental feature" notice also in CLI help

docs/cli.md

@@ -754,7 +754,7 @@ poetry python install <PYTHON_VERSION>
 ### python list
 
 The `python list` command shows Python versions available in the environment. This includes both installed and
-discovered System Managed and Poetry Managed installations.
+discovered System managed and Poetry managed installations.
 
 ```bash
 poetry python list

src/poetry/console/commands/python/install.py

@@ -46,7 +46,10 @@ class PythonInstallCommand(Command):
         ),
     ]
 
-    description = "Install the specified Python version from the Python Standalone Builds project."
+    description = (
+        "Install the specified Python version from the Python Standalone Builds project."
+        " (<warning>experimental feature</warning>)"
+    )
 
     def handle(self) -> int:
         request = self.argument("python")

src/poetry/console/commands/python/list.py

@@ -40,7 +40,10 @@ class PythonListCommand(Command):
         option("managed", "m", "List only Poetry managed Python versions.", flag=True),
     ]
 
-    description = "Shows Python versions available for this environment."
+    description = (
+        "Shows Python versions available for this environment."
+        " (<warning>experimental feature</warning>)"
+    )
 
     def handle(self) -> int:
         rows: list[PythonInfo] = []

src/poetry/console/commands/python/remove.py

@@ -36,7 +36,10 @@ class PythonRemoveCommand(Command):
         ),
     ]
 
-    description = "Remove the specified Python version if managed by Poetry."
+    description = (
+        "Remove the specified Python version if managed by Poetry."
+        " (<warning>experimental feature</warning>)"
+    )
 
     @staticmethod
     def remove_python_installation(request: str, implementation: str, io: IO) -> int: