ref: Put animation, pulsing, and text styles into the theme object

[ryan953]

Moving animation and text helpers into the theme object, in an effort to make them more discoverable and reusable.

Also, this will save an import everywhere, which some people care about.

Relates to https://github.com/getsentry/frontend-tsc/issues/27

See also https://github.com/getsentry/getsentry/pull/14036 See also https://github.com/getsentry/sentry/pull/71208