Add strict Dex Web v2 rendering

[longquanzheng]

Summary

• upgrade the basic-process template to strict Dex Web v2 / FDG 2.0 rendering
• add indexed title/state attributes, summary/display RPCs, and a native approval Action
• keep WaitFor condition-only and align the custom React UI with Action eligibility
• pin and build the Dex Web v2 CLI baseline in CI
• exclude CI's upstream-dex/ checkout from template gofmt validation

Rationale and user impact

Dex AI Platform applications need one supported Go template whose Flow renders correctly in Web v2. Generated projects now expose Run/Queue metadata and Actions without requiring a custom frontend, while the React example and HTTP contract continue to work.

The formatting check now validates only template-owned Go sources, so the checked-out upstream Dex tree cannot make CI fail for unrelated formatting.

Used by

• Publish Dex Skills monorepo dex-skills#22
• pinned commit: 9935dc09b646409f9dde3bf0c557480057b9eeab

Validation

• GOCACHE=/tmp/dex-template-go-cache DEXCLI=/tmp/dexcli-template-ci make check

The full check passed: generated-source verification, FDG 2.0 with valid: true, Go vet, Go/React unit tests, real Dex integration, Worker restart coverage, Playwright E2E, and production builds.