feat(eightsaf-extension): add EightSaf wallet adapter for Interchain Kit

[Mechack08]

Summary

• Add @interchain-kit/eightsaf-extension for EightSaf browser extension support
• Wire window.eightsaf through ExtensionWallet and CosmosWallet
• Enable Safrochain dApp flows: connect, sign, send, delegate, and broadcast
• Register Chrome and Firefox store download links in wallet metadata
• Add package README with chain-registry usage and Safrochain setup notes

Changes

• New package: wallets/eightsaf-extension
• Workspace lockfile updated for the new package

Test plan

• pnpm --filter @interchain-kit/core build
• pnpm --filter @interchain-kit/eightsaf-extension test
• pnpm --filter @interchain-kit/eightsaf-extension build
• Install EightSaf extension (Chrome or Firefox)
• In a Safrochain dApp, add eightsafWallet to ChainProvider
• Verify connect works for the active network (safrochain-1 or safrochain-testnet-1)
• Verify sign and broadcast (send / delegate) through EightSaf approval popups

Notes

• EightSaf is extension-only for now (no mobile WalletConnect adapter)
• dApp chain config must match the network selected in the EightSaf extension
• Safrochain mainnet is available in chain-registry: https://github.com/hyperweb-io/chain-registry/blob/main/v2/packages/chain-registry/src/mainnet/safrochain/chain.ts

[devin-ai-integration]

LGTM — thanks for adding 8SAF, and sorry it sat unreviewed for so long. The package follows the existing extension-adapter layout (ExtensionWallet + CosmosWallet wired via setNetworkWallet, registry with windowKey/cosmosKey/walletIdentifyKey/keystoreChange, publishConfig.directory: dist, workspace:* dep on core), matching e.g. wallets/ninji-extension.

Verified on a local merge onto current main: pnpm install --frozen-lockfile accepts the updated lockfile (it adds the wallets/eightsaf-extension importer; the rest of the lockfile diff is pnpm re-serialization), pnpm build and pnpm test pass (incl. the new package's test), and eslint src __tests__ in the new package is clean. Also confirmed it merges cleanly together with #39, #42 and #45. With lerna version --conventional-commits the package would be published as @interchain-kit/eightsaf-extension@0.11.0.

Optional follow-up: examples/react lists the other wallets in src/main.tsx; adding 8SAF there would make it easy to try in the demo app.

Reviewed by Devin on behalf of @pyramation