feat(python-runtime): package the Windows x64 dsh executable

Add node24-win-x64 as the only supported Windows runtime target and publish it as a py3-none-win_amd64 wheel containing the conventional dsh and ripgrep .exe payload names. Keep Windows ARM64 rejected explicitly so Python cannot claim a carrier that CI and release automation do not build.

Teach the pkg builder to require a native x64 Windows host, validate both node-pty ConPTY addons, copy @vscode's win32 ripgrep executable, and recognize pkg's .exe output. Extend runtime resolution, wheel staging, payload validation, and the preset closure check so the Windows-specific PowerShell plugins and sidecars fail loud when omitted.

The sidecar resolver now maps a packaged main.exe to main-rg.exe; focused TypeScript and Python tests cover that name, the win_amd64 manifest, x64-only host selection, complete wheel payload, ConPTY inventory, and platform-conditioned plugin closure.

python/sdk-runtime/package.json

@@ -59,6 +59,7 @@
     "@deepseek-ai/dsh-plan-mode": "workspace:^",
     "@deepseek-ai/dsh-persona": "workspace:^",
     "@deepseek-ai/dsh-pwsh-local": "workspace:^",
+    "@deepseek-ai/dsh-tool-pwsh-persistent": "workspace:^",
     "@deepseek-ai/dsh-terminal": "workspace:^",
     "@deepseek-ai/dsh-terminal-bash": "workspace:^",
     "@deepseek-ai/dsh-repeat-tool-reminder": "workspace:^",
@@ -103,6 +104,7 @@
     "@deepseek-ai/dsh-tool-fs": "workspace:^",
     "@deepseek-ai/dsh-tool-fs-search": "workspace:^",
     "@deepseek-ai/dsh-tool-goal": "workspace:^",
+    "@deepseek-ai/dsh-tool-pwsh": "workspace:^",
     "@deepseek-ai/dsh-tool-ralph": "workspace:^",
     "@deepseek-ai/dsh-tool-skill": "workspace:^",
     "@deepseek-ai/dsh-tool-str-replace-editor": "workspace:^",