The variables like `--color-error` now are based on our secondary
theming, thus they are less "aggressive" colors. But there are two
usecases for primary based status colors:
- borders
- error text messages (e.g. validation errors in forms)
To simplify app changes due to the secondary color theme change this
introduces 3 new variables:
- `--color-text-error` this shall be used if text should have error
status theming and is displayed on normal background (while
`--color-error-text` is only for text shown on `--color-error` similar
as primary and secondary colors)
- `--color-border-error` and `--color-border-success` those should be
used for element borders if there is one of those statuses to be
reported (we use this for validation errors as well as for indicating a
value was saved)
Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>