docs: add README with quick start and docs links

Co-Authored-By: Virgil <virgil@lethean.io>

README.md

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+# go-html
+
+HLCRF DOM compositor with grammar pipeline integration for server-side HTML generation and optional WASM client rendering. Provides a type-safe node tree (El, Text, Raw, If, Each, Switch, Entitled), a five-slot Header/Left/Content/Right/Footer layout compositor with deterministic `data-block` path IDs and ARIA roles, a responsive multi-variant wrapper, a server-side grammar pipeline (StripTags, GrammarImprint via go-i18n reversal, CompareVariants), a build-time Web Component codegen CLI, and a WASM module (2.90 MB raw, 842 KB gzip) exposing `renderToString()`.
+
+**Module**: `forge.lthn.ai/core/go-html`
+**Licence**: EUPL-1.2
+**Language**: Go 1.25
+
+## Quick Start
+
+```go
+import "forge.lthn.ai/core/go-html"
+
+page := html.NewLayout("HCF").
+    H(html.El("nav", html.Text("i18n.label.navigation"))).
+    C(html.El("main",
+        html.El("h1", html.Text("i18n.label.welcome")),
+        html.Each(items, func(item Item) html.Node {
+            return html.El("li", html.Text(item.Name))
+        }),
+    )).
+    F(html.El("footer", html.Text("i18n.label.copyright")))
+
+rendered := page.Render(html.NewContext("en-GB"))
+```
+
+## Documentation
+
+- [Architecture](docs/architecture.md) — node interface, HLCRF layout, responsive compositor, grammar pipeline, WASM module, codegen CLI
+- [Development Guide](docs/development.md) — building, testing, WASM build, server/client split rules
+- [Project History](docs/history.md) — completed phases and known limitations
+
+## Build & Test
+
+```bash
+go test ./...
+go test -bench . ./...
+GOOS=js GOARCH=wasm go build -ldflags="-s -w" -o gohtml.wasm ./cmd/wasm/
+go build ./...
+```
+
+## Licence
+
+European Union Public Licence 1.2 — see [LICENCE](LICENCE) for details.