release: v0.7.0

[pbertsch]

Summary

Release-prep PR for v0.7.0. After merge, tag `v0.7.0` to trigger the release workflows.

Files bumped:

• `VERSION` → 0.7.0
• `vscode/package.json` → 0.7.0
• `docs/wiki/Home.md` current-version reference → 0.7.0
• `website/src/pages/index.astro` landing badge → v0.7.0
• `CHANGELOG.md`: `[Unreleased]` → `[0.7.0] - 2026-05-02`

`flutter_probe_agent` already at 0.7.0 (bumped in #86 — includes the mDNS advertising change).

v0.7.0 contents

• MCP device tools (feat(mcp): device lifecycle tools (list/start/shutdown) #84) — 5 new tools (`list_devices`, `list_simulators`, `list_avds`, `start_device`, `shutdown_device`) + `device` arg on existing tools
• Studio physical USB (feat(studio): physical-device support over USB #85) — Connect handles physical iOS (iproxy) and physical Android (adb forward); picker shows `physical` tag
• Studio mDNS WiFi discovery (feat(studio,agent): mDNS auto-discovery for WiFi physical devices #86) — agent advertises `_flutterprobe._tcp`; Studio browses + connects with one click + token paste

Post-merge

```
git tag v0.7.0
git push origin v0.7.0
```

This kicks off:

• GitHub release workflow (Go binaries: probe, probe-mcp, Studio)
• pub.dev publish (`flutter_probe_agent` 0.7.0)
• Homebrew tap formula update (auto via `HOMEBREW_TAP_TOKEN`)