fix: python tool message formatting and check for docker

[PeterCardenas]

I encountered a couple of different issues with the python tool:

1. There was a typo in the confirm message and it is a bit unclear.
2. When docker is not installed, the tool fails and the response does not finish.

I have fixed the first issue by fixing the typo, listing out the container name, and making sure that the code starts on a new line.
The second issue was fixed by first checking if docker is installed, and if not, sending back a message to the LLM to make it clear that the Python tool should not be used. I had a bit of prompt engineering here since a simple error message here made the LLM try the python tool again with simpler python scripts.

[PeterCardenas]

additionally, the confirm message seems quite jank after putting the newline, maybe we should consider some different UI instead of vim.fn.confirm

[yetone]

additionally, the confirm message seems quite jank after putting the newline, maybe we should consider some different UI instead of vim.fn.confirm

I am using a float window to replace vim.fn.confirm in another branch.