Add LAzyVim config options to README and sign it

[elliottgreen]

I tried this a couple hours ago, but I signed it with the wrong key.
Closed that pull-request, did the same thing, but signed it properly this time.

[WhiteBlackGoose]

The upstream is sadly dead, so I merge some PRs into my fork.

[lumpsoid]

@elliottgreen
run = "UpdateRemotePlugins" is an unavailable option in lazy.nvim, so it doesn't have any effect on the configuration.

Therefore, it is not essential for the configuration to function correctly.

If you have used the run command in a similar way to packer.nvim, where it can be a string, function, or table, serving as a post-update/install hook, in lazy.nvim, the equivalent option would be build.

The build option is executed when a plugin is installed or updated. If it is a string, it will be run as a shell command. When prefixed with :, it is treated as a Neovim command. Additionally, you can specify a list to execute multiple build commands.

However, even without using the build option, it is not necessary for the configuration to work. It seems that the keys option is sufficient to achieve the desired behavior.

[WhiteBlackGoose]

I can now merge PRs. @lumpsoid could you propose changes to the PR so I could merge the correct version?

[lumpsoid]

@WhiteBlackGoose
The last time I came here to check the config again, it didn't work for me, and since I couldn't figure out what the problem was quickly, it was all put aside.

Now I tried it again and was able to figure out what the problem was.
I reinstalled the system, so I ran into this problem again with this plugin not wanting to run in LazyVim

What are the steps to check to get the plugin working:

1. if you are using virtual env for development, check that you have activated it before going into neovim.
2. check that you have pynvim pip install pynvim.
3. check that you have jupyter notebook
4. once you have installed pynvim then close the existing console and open a new one, where try to open neovim again and run magam using <leader>mi if you are using this config.