add flag to indicate swimUSD & do not mark them as stable coin

[swimthor]

Notion ticket: https://www.notion.so/exsphere/Mark-swimUSD-as-not-a-stablecoin-and-override-in-UI-ed8a5fc9e6c84083af460264023dd64a

Checklist

• Github project and label have been assigned
• Tests have been added or are unnecessary
• Docs have been updated or are unnecessary
• Preview deployment works (visit the Cloudflare preview URL)
• Manual testing in #product-testing completed or unnecessary
• New i18n strings do not contain any security vulnerabilities (e.g. should not allow translator to update email/url)
• When fetching new translations from external sources, do a sanity check (e.g. get people who speak the language to check, shove all new translations into Google translate)

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	e1eed2e
Status:	✅  Deploy successful!
Preview URL:	https://8a661be6.swim-ui.pages.dev
Branch Preview URL:	https://swim-usd-is-not-stable-coin.swim-ui.pages.dev

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[wormat]

Not really a fan of this. Why not just compare against the token project ID?

[swimthor]

@wormat because we also have swimUSDv2, it will be bulky to use if we have to check the token project id

[wormat]

Ah but we won't have legacy token projects in the SDK after https://www.notion.so/exsphere/Remove-any-kind-of-legacy-support-from-the-SDK-e2bb36ec76164d2e98de8a270296e9d8
I'm OK with adding it to the UI config I guess, or having a helper function?