refactor(calendar): Schemas (#489)

* refactor(calendar): Add styles for `date-selected-special-*` and improve `date-current-*` and `date-special-*` theme handling across schemas

* fix(calendar): change `date-current-border-radius` inside the bootstrap schema to use correct value

* feat(calendar): add `date-special-range-*-border-color` styles across schemas for improved range selection customization

* refactor(calendar): update calendar theme auto styles and schema colors

* chore(calendar): removing temporary `$auto-theme` prop

* chore(calendar): adjust `weekday-color` and `week-number-foreground` styles in dark schema

* Update sass/themes/schemas/components/light/calendar/_days-view.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/schemas/components/light/calendar/_days-view.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/schemas/components/light/calendar/_days-view.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/components/calendar/_calendar-theme.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/components/calendar/_calendar-theme.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/components/calendar/_calendar-theme.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/schemas/components/light/calendar/_days-view.scss

Co-authored-by: Copilot <[email protected]>

* Update sass/themes/schemas/components/light/calendar/_days-view.scss

Co-authored-by: Copilot <[email protected]>

* fix(calendar): correct focus state descriptions for `date-selected-special-focus-*` styles in light schema

* chore(calendar): update `date-current-foreground` color in light schema to improve contrast

* chore(calendar): reorganize and enhance `date-current-*` and `date-special-*` sass doc

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Co-authored-by: Copilot <[email protected]>

Author: desig9stein