feat(hooks): implement account hook create/delete support across base, Spring, MicroProfile, and docs

[amkr6207]

Description:

Follow-up to #72 (API contracts part)

Implement the remaining scope of #65 by adding account hook create/delete support in base APIs, exposing it through Spring and MicroProfile, and documenting usage.

• Add AccountClient.updateAccountHooks(...) high-level API
• Add hook models and protocol request/result types
• Implement protocol-layer account hook update transaction flow
• Add/extend unit tests for request validation and client wiring
• Add Spring and MicroProfile service exposure tests
• Update README and docs with hook lifecycle usage examples

Related issue(s):

Fixes #65

Notes for reviewer:
Local spotless:check, compile, and test-compile pass.

Checklist

• Documented (README/docs)
• Tested (unit + framework exposure tests)