chore: update Sei native and Wrapped Sei logos

[jeremytsng]

Description

Sei has updated their brand logo. This updates the Sei logos served from contract-metadata to the new brand mark, so token/network icons resolved by address stay consistent with the refreshed brand.

Updated icons (SEI Mainnet, eip155:1329):

• Native SEI — icons/eip155:1329/slip44:19000118.svg
• Wrapped Sei (WSEI) — icons/eip155:1329/erc20:0xE30feDd158A2e3b13e9badaeABaFc5516e95e8C7.svg

The previous icons used Sei's old red wave mark, which is no longer part of the brand palette. The new icons use Sei's current token mark in maroon (#600014) on a white background.

• Square artboard (360×360) with a solid white background that fills the circular crop — so the mark stays legible in both light and dark mode (per STYLEGUIDE.md).
• Symbol centered within the 80% safe area (~10% padding).
• Pure vector path only — no embedded rasters, CSS, or filters.

Filenames are unchanged, so the existing metadata/*.json logo references resolve to the updated assets with no metadata changes.

Testing

• yarn test — all 13704 checks pass.

[cursor]

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[maxime-oe]

We may want to add a white background to this ?