feat: activate r_neovim

[Massolari]

PR Details

Subreddit

https://www.reddit.com/r/neovim/hot/

Telegram Channel

https://t.me/r_neovim

Checklist

• Added channels/%submodule_name%/app.py file.
• Added channels/%submodule_name%/__init__.py file.
• Added channels/%submodule_name%/tags.txt file.
• Updated own.cron.
• Already have nice channel's profile pic.
• Already have mentioned @r_channels and @reddit2telegram in the description of your channel.
• @reddit2telegram_bot added as admin to this channel.

• %submodule_name% should be in lowercase.
• Tags in tags.txt should be space-separeted and start with # each.