feat(dingtalk): reuse authentication through native cloud adapters

[luckjun529-lang]

DingTalk currently keeps authentication in the source machine’s DWS store, so commands on another device require another login. This change adds the native account-auth adapter and routes supported cloud commands through Wegent’s credential broker.

• Package the adapter for macOS arm64/amd64, Linux arm64/amd64, and Windows amd64. Vendor the build tools inside the plugin so GitHub-to-intranet directory synchronization preserves the build inputs.
• Use auth SDK 0.7.1, including identity resolution from the host’s recorded Codex/Claude runtime copies; publish plugin version 0.3.3.
• Support configured HTTPS DWS binary mirrors with pinned versions and SHA-256 verification. Source/toolchain build downloads still require their configured upstream connectivity; this does not provide a domestic source mirror.
• Preserve unrelated DWS accounts and fence exclusive authentication transfers and device revocation.

Validation: public plugin suite 24 passed / 1 platform skip; SDK suite 23 passed; DWS build companion 16 passed; vendored source/checksum checks passed. Real Backend/Electron/remote-executor E2E passed all 17 assertions using synthetic providers, including DWS migration, cloud execution and revocation. Native Windows and real DingTalk-account acceptance remain separate from these tests.

Requires Wegent wecode-ai/Wegent#3341 and internal declarative build support https://git.intra.weibo.com/weibo_rd/common/wecode/wework-plugins/-/merge_requests/51. Companion email: https://git.intra.weibo.com/weibo_rd/common/wecode/wework-plugins/-/merge_requests/50. Creating this PR does not publish a marketplace release.