docs: Add nvim-conan community integration

[mm4cN]

Adds nvim-conan to the Community integrations section.

nvim-conan provides Conan 2 workflows directly from Neovim, including package, profile and remote management as well as common build/package operations.

Repository: https://github.com/mm4cN/nvim-conan

[CLAassistant]

All committers have signed the CLA.

[uilianries]

@mm4cN Hello! Thank you for bringing this integration to neovim.

I would suggest pushing your plugin to https://neovimcraft.com/ as well, the neovim central index, to give more visibility to your project.

Have you sent it there before? I could not find your plugin listed there.

Doing a quick search for other vim and neovim plugins for Conan, yours looks more promising, so I hope you keep it running for a long time 😄

I also recommend adding CI support to your project with GitHub Actions, so you can verify that your plugin installs correctly and isn't broken when releasing a new update. So far, I needed to download and install locally to check if it's working. Same for adding tests, you could use mini.test or busted to validate your project as well, it will help to mature your project.

During minimal local validation, I spotted 2 important cases; I listed them in your repository:

• Conan build policy is incomplete and non-optional mm4cN/nvim-conan#1
• Conan create does not support package version mm4cN/nvim-conan#2

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My recommendation is to mature the project a bit more first, before promoting it in the Conan documentation (merging this PR), so users will expect a better experience when trying it for the first time.

Please consider my previous recommendations, such as CI, tests, and the listed issues. Regards.