docs: add README with quick start and docs links

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

README.md

@@ -0,0 +1,45 @@
+# go-help
+
+Display-agnostic help content management library. Provides a YAML/Markdown topic catalogue, full-text search with inverted index, stemming, fuzzy matching, and relevance scoring, goldmark-based Markdown rendering, an HTTP server with six routes (three HTML, three JSON), a static site generator with client-side JavaScript search, and CLI help text ingestion. No runtime dependency on a database, network, or external service.
+
+**Module**: `forge.lthn.ai/core/go-help`
+**Licence**: EUPL-1.2
+**Language**: Go 1.25
+
+## Quick Start
+
+```go
+import "forge.lthn.ai/core/go-help"
+
+catalog := help.DefaultCatalog()
+catalog.Add(&help.Topic{ID: "rate-limiting", Title: "Rate Limiting", Content: "..."})
+
+// Search
+results := catalog.Search("sliding window token")
+
+// HTTP server (HTML + JSON routes)
+srv := help.NewServer(catalog, ":8080")
+srv.ListenAndServe()
+
+// Static site output
+help.Generate(catalog, "./dist")
+```
+
+## Documentation
+
+- [Architecture](docs/architecture.md) — catalog, parser, search engine, HTTP server, static site generator, CLI ingestion
+- [Development Guide](docs/development.md) — building, testing, benchmarks, coding standards
+- [Project History](docs/history.md) — completed phases and known limitations
+
+## Build & Test
+
+```bash
+go test ./...
+go test -bench=. -benchmem ./...
+go vet ./...
+go build ./...
+```
+
+## Licence
+
+European Union Public Licence 1.2 — see [LICENCE](LICENCE) for details.