chore: singe source of truth for version & show it on splash screen (#7)

Co-authored-by: 2mal3 <56305732+2mal3@users.noreply.github.com>

display/web/main.go

@@ -15,6 +15,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	shared "plg-mudics/shared"
+	"strings"
 
 	"github.com/gabriel-vasile/mimetype"
 	"github.com/labstack/echo/v4"
@@ -35,7 +36,9 @@ func StartWebServer(v string, port string) {
 	e.GET("/", indexRoute)
 	e.GET("/sse", sseRoute)
 	e.GET("/splash", func(ctx echo.Context) error {
-		return ctx.HTML(http.StatusOK, shared.SplashScreenTemplate)
+		html := shared.SplashScreenTemplate
+		html = strings.ReplaceAll(html, "%%APP-VERSION%%", version)
+		return ctx.HTML(http.StatusOK, html)
 	})
 	e.GET("/qr", qrRoute)