feat(style): add conversions from the palette crate colors

[joshka]

This is behind the "palette" feature flag.

use palette::{LinSrgb, Srgb};
use ratatui::style::Color;

let color = Color::from(Srgb::new(1.0f32, 0.0, 0.0));
let color = Color::from(LinSrgb::new(1.0f32, 0.0, 0.0));

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.2%. Comparing base (e6871b9) to head (bde0bf4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1172 +/- ## ======================================= - Coverage 94.2% 94.2% -0.1% ======================================= Files 60 60 Lines 14523 14521 -2 ======================================= - Hits 13684 13682 -2 Misses 839 839 ```

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[EdJoPaTo]

Given that the terminals are reexported, should this be reexported too (when the feature flag is given)?

[joshka]

Given that the terminals are reexported, should this be reexported too (when the feature flag is given)?

There's no public code to export - just trait impls.

[EdJoPaTo]

Given that the terminals are reexported, should this be reexported too (when the feature flag is given)?

There's no public code to export - just trait impls.

Srgb for example? Currently, this feature needs to be enabled and palette be added as dependency to your crate to use it?

[joshka]

Given that the terminals are reexported, should this be reexported too (when the feature flag is given)?

There's no public code to export - just trait impls.

Srgb for example? Currently, this feature needs to be enabled and palette be added as dependency to your crate to use it?

Ah, gotcha. I'd expect that the only people wanting to turn this on are probably people that are specifically using palette already. Also we have a palette module already (so this could easily cause confusion).