fix(toggleswitch): apply size styles

[xonaib]

Summary

• apply small and large size classes from the ToggleSwitch size input
• add ToggleSwitch CSS rules for small and large dimensions
• add regression coverage for default, small, and large size classes

Fixes #86

Test plan

• pnpm --filter @openng/optimus-ui test:unit --include=src/toggleswitch/toggleswitch.spec.ts
• pnpm --filter @openng/optimus-ui-styles build
• pnpm run build:lib