feat: define swap QuoteResponse V2 schema validators

[micaelae]

Explanation

Implements schema definitions and validators based on this ADR: https://github.com/MetaMask/decisions/blob/main/decisions/trading/0057-swap-bridge-quote-metadata-migration.md

References

Implements https://consensyssoftware.atlassian.net/browse/SWAPS-4546

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Touches core bridge quote/trade validation shapes that downstream clients will adopt; changes are mostly additive but incorrect v2 parsing could affect migration consumers.

Overview
Adds QuoteResponse v2 validation (validateQuoteResponse, QuoteSchemaV2) aligned with the swap/bridge quote metadata migration: quotes use src/dest amount + asset blocks (AmountsAndAsset + BridgeAssetV2), array-based feeData (including network / relayer), richer priceData, and StepSchemaV2. Trade/approval shapes are validated per CAIP namespace (EVM, Solana, Tron, Bitcoin, Stellar) derived from the source asset’s assetId.

Introduces BridgeAssetV2 / MinimalAsset (CAIP assetId, optional security metadata) and validateBridgeAssetV2, while keeping v1 BridgeAsset in bridge-asset.ts (deprecated) and re-exporting validators/types from the package entry. NumberStringSchema is renamed to PositiveNumberStringSchema where used (e.g. batch-sell fees, tx fee gas limits).

Runtime quote fetching in this package still uses v1 (validateQuoteResponseV1); v2 is exported for consumers/migration. Test fixtures/snapshots normalize EVM addresses to lowercase.

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