feat: add specialized Copilot agent team for Python/wxPython desktop accessibility

.github/agents/AGENTS.md

@@ -0,0 +1,28 @@
+# Agent Teams Configuration (Python-Only)
+
+This workspace keeps only the Python-focused Developer Tools team.
+
+## Team: Developer Tools
+
+**Lead:** `developer-hub`
+
+**Members:**
+
+- `python-specialist` - Python debugging, packaging, testing, typing, async, performance
+- `wxpython-specialist` - wxPython GUI layout, events, threading, desktop patterns
+- `desktop-a11y-specialist` - Desktop accessibility APIs and control accessibility patterns
+- `desktop-a11y-testing-coach` - NVDA/JAWS/Narrator/VoiceOver/Orca testing guidance
+- `a11y-tool-builder` - Python tooling design (rule engines, parsers, reports)
+
+**Skill:**
+
+- `python-development` - Shared Python/wxPython development guidance
+
+## Scope and Routing
+
+- Use `developer-hub` as the default entry point for Python and desktop tasks.
+- Route language/runtime/package/test topics to `python-specialist`.
+- Route GUI-specific questions to `wxpython-specialist`.
+- Route platform accessibility implementation to `desktop-a11y-specialist`.
+- Route accessibility testing workflows to `desktop-a11y-testing-coach`.
+- Route tool/scanner architecture work to `a11y-tool-builder`.