docs(readme): Linux installers, nixos docs, readme refactor and gruvb…

[iruzo]

Proposed Changes

• Trying to reduce size of README and improving readability.
• Added one click installers for unix/linux as POSIX sh scripts.
• Documented NixOS installation.
• Added gruvbox theme (preview webp is still needed).

[unseen-ninja]

Ayo! That's a lot. Big thank you for this! <3

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Readme

As you have mentioned on Discord; some of these changes are highly objective. Personally I find the readme changes more confusing to read through. Things are also a little bit out of order with the previews just kinda hanging there without being attached to a specific section. o:
And the whole customisation and integration stuff feels a little lost inside all these spoilers.

Oh, and highly personal: I abso-fucking-lutely hate emojis. :D

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Gruvbox

The Gruvbox theme is lovely actually! I'll for sure add that one into the mix for the colour schemes. c:

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Installer

I also quite like the addition of the installation script, tho if I read that right, there are some issues with it.

First up, the order of changing to the config dir, and removing a potentially pre-existing chrome folder could be swapped to make things a little less convoluted. The default directory may also not always be caught by the regex, I believe? But I'd say that can be omitted.
What I think should def. be there is some sort of warning and check to confirm that an existing chrome folder should be deleted as this might cause unwanted data loss!

Furthermore I'd personally like to have just one installer script that would take arguments for the desired colour scheme to declutter the whole thing a little more. (And maybe even support macOS as well)

I'm happy to look into the changes for the installer script and put them into a separate branch in order for us to make things nice. ^—^

[iruzo]

Hello @andreasgrafen !, take a look at the changes, there's no need to rush, thank you.

I changed the installer script, so you can pass the theme as parameter (in order to do that, I changed the themes directory from integrations/theme/theme.css to integrations/theme.css).

I also changed the README to move the theming preview to the customization section and removed the emojis, if this doesn't look good enough, I can restore the README to default and just add the doc for gruvbox and the installer.