Adds System Preferences, Dark and Light themes, gated by the
`hasThemeSwitcher` feature flag (off by default — dark stays the default
theme for everyone).
Old theme is now "Classic"and set as default.
"System preferences" theme has both Light and Dark modes and uses your
laptop settings to use a correct one.
It has less color accents (specifically less colored text), and they are
the same for both modes, only grayscale values change between them. And
Light/Dark themes can be used separately.
New Contrast setting is available for System Preferences, Dark and Light
themes - it changes the contrast for the whole app. All new visual
Settings live in Account.
- Added versions filtering on the Errors list and page
- Added errors stacked bars to the graph on the individual error page
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Co-authored-by: James Ritchie <james@trigger.dev>