Add Catppuccin Themes (v4)

[cswimr]

This PR adds Catppuccin themes (the same ones from my previous v3 pr) to v4.

[cswimr]

Just realized I made the same mistake as I did on the original pr with the light theme, fixing real quick

[cswimr]

Ok, I think a bit more work would be required to get Latte working properly, some elements (notably the profile dropdown in the top right) aren't readable and also aren't being themed properly.

I'll commit the current version of Latte that I'm testing, because it is closer to the intended theme, but it's not ready for merging yet. Assistance on this would be appreciated.

[diced]

I think the issue was that you set the colorScheme for the latte theme as dark instead of light. A quick look at the theme tells me that it should be a light theme instead of a dark theme since most of the colors are lighter. I think some of the colors do need some work, since it doesn't look quite right yet.

Since this is one of the first light themes that doesn't use the default #FFF colors it might be a bit finicky so let me know here or on discord if there are any issues still.

colorScheme: light

colorScheme: dark

After this, I realized this was the only custom "light" theme and went to figure out how mantine handled this (so you wouldn't be wasting any time), and came up with this theme that seems to work and look good to me, although I'm not sure if I followed Catppuccin's guidelines

{
  "name": "Catppuccin Latte",
  "colorScheme": "light",
  "colors": {
    "blue": [
      "#FFFFFF",
      "#3676f6",
      "#0a57ee",
      "#094ed6",
      "#1d42f5",
      "#1d54f5",
      "#1d65f5",
      "#1d77f5",
      "#1d89f5",
      "#1e66f5"
    ],
    "gray": [
      "#ccd0da",
      "#ccd0da",
      "#9ca0b0",
      "#ccd0da",
      "#acb0be",
      "#bcc0cc",
      "#5c5f77",
      "#eff1f5",
      "#e6e9ef",
      "#dce0e8"
    ]
  },
  "white": "#eff1f5",
  "primaryColor": "blue",
  "mainBackgroundColor": "#e6e9ef"
}

Here's how it looks: