Thanks to `impl From<bool> for Vec2b` one can now shorten some builder
calls, like:
Previous:
```rust
egui::ScrollArea::vertical()
.auto_shrink([false; 2])
```
New:
```rust
egui::ScrollArea::vertical()
.auto_shrink(false)
```
* split out ecolor crate
* split up ecolor crate in lots of modules
* add changelog notes
* add readme to ecolor
* put clippy::manual_range_contains on cranky allow list
* fix hex color issues
* doc fixes
* more hex_color fixes
* Document features
* Rename hex_color module to avoid warning
* Sort the feature names
* fix link in CHANGELOG.md
* better wording
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
