Bundled Themes: Initial import of the Twenty Twenty-Five default theme.
It's a new dawn, it's a new day.
It's a new default theme for 2025.
And I'm feeling good.
Props poena, karmatosed, onemaggie, juanfra, garethelwell, joen, beafialho, richtabor, noruzzaman, shailu25, kishanjasani, up1512001, ajlende, huzaifaalmesbah, kafleg, dballari, lastsplash, jennifarhat, amjadr360, rejaulalomkhan, oncecoupled, devmuhib, tanvirul, arkenon, elfu98, erichmond, kardi420, ktaron, melchoyce, maneshtimilsina, jorbin, ritterml, eherman24, vcanales, ikamal, bobbyleenoblestudios, germanfrelo, kraftbj, mcrisp1972, peterwilsoncc, luminuu, eliorivero, jeherve, fac3less, alexandrebuffet.
Fixes #62103.
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