Adds Framework/ViewRenderer.wsc (WscMvc.ViewRenderer), loading separate
.html templates and substituting {{Key}} placeholders with HTML-encoded
values from a Scripting.Dictionary. Wires /hello through the new pipeline
(HomeController -> Application -> ViewRenderer -> Views/Home.html) while
preserving the exact pre-M4 response body, so the M1 acceptance test
doubles as a live regression check for the render pipeline.

Views/ is unreachable over HTTP by the same physical-separation guarantee
already used for Framework/ and Controllers/ (sibling of public/, never
inside it) - verified directly, not assumed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>