Refactoring: move all code files into a src directory

src/UI/Base/Button.ts

@@ -0,0 +1,25 @@
+import Translations from "../i18n/Translations"
+import BaseUIElement from "../BaseUIElement"
+
+export class Button extends BaseUIElement {
+    private _text: BaseUIElement
+
+    constructor(text: string | BaseUIElement, onclick: () => void | Promise<void>) {
+        super()
+        this._text = Translations.W(text)
+        this.onClick(onclick)
+    }
+
+    protected InnerConstructElement(): HTMLElement {
+        const el = this._text.ConstructElement()
+        if (el === undefined) {
+            return undefined
+        }
+        const form = document.createElement("form")
+        const button = document.createElement("button")
+        button.type = "button"
+        button.appendChild(el)
+        form.appendChild(button)
+        return form
+    }
+}