- Moved all extension files to .example to not load them by default.

- Added and changed stuff in README

ext/test.py.example

@@ -0,0 +1,24 @@
+# pybot-f test extension ...
+# this code has been copied from the docs/github
+
+import discord
+from discord import app_commands
+from discord.ext import commands
+
+class TestCog(commands.GroupCog, name="testgrpcmds"):
+  def __init__(self, bot: commands.Bot) -> None:
+    self.bot = bot
+    super().__init__()  # this is now required in this context.
+
+  @app_commands.command(name="sub-1")
+  async def my_sub_command_1(self, interaction: discord.Interaction) -> None:
+    """ /parent sub-1 """
+    await interaction.response.send_message("Hello from sub command 1", ephemeral=True)
+
+  @app_commands.command(name="sub-2")
+  async def my_sub_command_2(self, interaction: discord.Interaction) -> None:
+    """ /parent sub-2 """
+    await interaction.response.send_message("Hello from sub command 2", ephemeral=True)
+
+async def setup(bot: commands.Bot) -> None:
+  await bot.add_cog(TestCog(bot))