Feature: AssetServer Runtime (#2335)

* Tidy up runtime JS

* Initial implementation of runtime over http

* Update runtime deps. Fix test task.

* Support Clipboard.
Message Processor refactor.

* Add `Window.Screen()`
Clipboard `GetText` -> `Text`

* Support most dialogs
Better JS->Go object mapping
Implement Go->JS callback mechanism
Rename `window.runtime` -> `window.wails` to better reflect the Go API

* Support SaveFile dialog

* Remove go.work

* Tidy up

* Event->CustomEvent to prevent potential clash with native JS Event object
Support Eventing

* Support application calls

* Support logging

* Support named windows
Remove debug info

* Update v3 changes

v3/pkg/application/messageprocessor_clipboard.go

@@ -0,0 +1,25 @@
+package application
+
+import (
+	"net/http"
+)
+
+func (m *MessageProcessor) processClipboardMethod(method string, rw http.ResponseWriter, _ *http.Request, _ *WebviewWindow, params QueryParams) {
+
+	switch method {
+	case "SetText":
+		title := params.String("text")
+		if title == nil {
+			m.Error("SetText: text is required")
+			return
+		}
+		globalApplication.Clipboard().SetText(*title)
+		m.ok(rw)
+	case "Text":
+		text := globalApplication.Clipboard().Text()
+		m.text(rw, text)
+	default:
+		m.httpError(rw, "Unknown clipboard method: %s", method)
+	}
+
+}