[AS-2596] feat: validate the shared WAM contract

[pbc1017]

Summary

• add a language-neutral JSON Schema for the Go server and React WAM wire contract
• verify Go field/function parity and validate host WAM data in TypeScript
• adopt SDK WAM 0.17.2, WAM UI 0.4.0, and redesigned Bezier beta components
• add repeatable Go and WAM CI

Test plan

• go test ./...
• yarn format:check
• yarn lint
• yarn typecheck
• WAM and Go production builds
• CDP light/dark rendering
• CDP manager and bot payloads
• CDP invalid-contract error state

Generated with Codex.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 50022ec5-1acf-4306-810f-e8002ec750b2

📥 Commits

Reviewing files that changed from the base of the PR and between 3d891e7 and 787c2d6.

⛔ Files ignored due to path filters (1)

• wam/yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (14)

• .github/workflows/ci.yml
• Makefile
• README.md
• contracts/tutorial-wam-data.schema.json
• internal/tutorial/app.go
• internal/tutorial/app_test.go
• internal/tutorial/contracts.go
• internal/tutorial/contracts_test.go
• wam/README.md
• wam/package.json
• wam/src/contracts.ts
• wam/src/hooks/useTutorialWamData.ts
• wam/src/pages/Send/Send.styled.ts
• wam/src/pages/Send/Send.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/shared-bezier-beta

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