Update the iPlug2 submodule to the wasm/web-mcp branch, which adds a
WebMCP agent bridge to the Wasm host pages (parameter automation, state
snapshot/restore, IGraphics inspection and manipulation, pointer and
keyboard simulation, screenshots, WebView actions).

TemplateProjectWebView: annotate the editor-size buttons with
data-iplug-action ids, register a reset-gain action through
window.iPlugWebMCP, and stop the knob's decorative SVG strokes from
intercepting pointer input. TemplateProject: the Makefile distribution
script now copies the shared host scripts (footer UI and bridge) next to
the generated page. CLAUDE.md points at the bridge documentation.