Feat/eip 7702 internal rpc middleware

[MoMannn]

Explanation

This PR adds RPC methods for upgrading Externally Owned Accounts (EOAs) to EIP-7702 delegator accounts. This functions are only callable by preinstalled snaps. It adds

wallet_upgradeAccount for upgrading the account
wallet_getAccountUpgradeStatus for checking if account is upgraded or not

References

Needed for: MetaMask/metamask-extension#36452

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, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

---

Note

Adds new package implementing internal RPC methods wallet_upgradeAccount and wallet_getAccountUpgradeStatus for EIP-7702 account upgrades, with tests/docs and monorepo wiring (README, tsconfig, ownership).

• New package: packages/eip-7702-internal-rpc-middleware
  • Methods: wallet_upgradeAccount, wallet_getAccountUpgradeStatus
  • Core: validation utils (validateParams, validateAndNormalizeAddress), constants (METHOD_NAMES, DELEGATION_INDICATOR_PREFIX), types, and hook-based handlers with error handling and EIP-7702 support checks/delegation code parsing.
  • Tooling: Jest tests, Typedoc config, tsconfigs, package metadata, changelog, license.
• Monorepo integration:
  • Update README.md (package list and graph) and add build reference in tsconfig.build.json.
  • Add ownership: .github/CODEOWNERS and teams.json entries for the new package.

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[jeffsmale90]

This looks great. A couple minor naming comments.

[mcmire]

Did a brief pass, will do a round 2 later.

One question I had: Is it necessary to add internal-rpc within the package name? We didn't do that for eip-5792-middleware I notice.

[jeffsmale90]

@mcmire

Is it necessary to add internal-rpc within the package name? We didn't do that for eip-5792-middleware I notice.

The reasoning for this is that these RPCs aren't strictly EIP-7702, they're internal RPCs for supporting EIP-7702, not intended for consumption by third parties.