chore(transaction-pay-controller): declare @metamask/keyring-controller as a dependency

[cryptodev-2s]

Explanation

src/strategy/relay/hyperliquid-withdraw{,.test}.ts imports @metamask/keyring-controller at runtime, but the package wasn't listed in dependencies. Consumers were relying on transitive hoisting to install it — once a stricter import-x/no-extraneous-dependencies runs (or yarn's hoisting layout changes), the missing dep would surface. This PR adds it explicitly so the dep relationship is correct and consumers get the package installed transitively.

Also regenerates README.md so the workspace dependency graph reflects the new edge.

References

• Surfaced while investigating the scoped lint-plugin resolutions on feat: add @metamask/platform-api-docs package #8012.
• Extracted from the parked chore: bump lint plugins and resolve floating-version fallout #8940 so the dep cleanup can land independently of the lint-plugin major bumps that PR also carried.

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 — N/A