Add frontend pages, move static to www/, add resolution to tester

Frontend:
- index.html: probe device, navigate to standard/homekit by type
- standard.html: camera config, model search with multi-select
- create.html: stream URL list, custom URL input, create test session
- homekit.html: HomeKit device info, contact links, fallback to standard

Backend:
- Move static files to www/ package with embed (go2rtc pattern)
- Add initStatic() in api with FileServer
- Add width/height to test results from H264 SPS parsing
- Contribute links to gostrix.github.io with auto-filled params

internal/api/api.go

@@ -1,9 +1,7 @@
 package api
 
 import (
-	"embed"
 	"encoding/json"
-	"io/fs"
 	"net"
 	"net/http"
 	"time"
@@ -25,10 +23,7 @@ func Init() {
 	HandleFunc("api/health", apiHealth)
 	HandleFunc("api/log", apiLog)
 
-	// serve frontend from embedded web/ directory
-	if sub, err := fs.Sub(webFS, "web"); err == nil {
-		http.Handle("/", http.FileServer(http.FS(sub)))
-	}
+	initStatic()
 
 	Handler = middlewareCORS(http.DefaultServeMux)
 
@@ -39,9 +34,6 @@ func Init() {
 	go listen_serve("tcp", listen)
 }
 
-//go:embed web
-var webFS embed.FS
-
 func listen_serve(network, address string) {
 	ln, err := net.Listen(network, address)
 	if err != nil {