Broke up UI into seperate file, reorganisation of dirtree, added ViewStack

data/resources/ui/window.ui

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="GnomeframeWindow" parent="AdwApplicationWindow">
+    <property name="default-width">800</property>
+    <property name="default-height">600</property>
+    <property name="title">Gnomeframe</property>
+    <property name="content">
+      <object class="AdwToolbarView">
+        <child type="top">
+          <object class="AdwHeaderBar">
+            <child type="start">
+              <object class="GtkButton" id="btn_save_as">
+                <property name="tooltip-text" translatable="yes">Save as…</property>
+                <property name="icon-name">floppy-symbolic</property>
+              </object>
+            </child>
+            <child type="end">
+              <object class="GtkMenuButton">
+                <property name="icon-name">open-menu-symbolic</property>
+                <property name="menu-model">primary_menu</property>
+                <property name="tooltip-text" translatable="yes">Main Menu</property>
+                <property name="primary">true</property>
+              </object>
+            </child>
+            <property name="title-widget">
+              <object class="AdwViewSwitcher">
+                <property name="policy">1</property>
+                <property name="stack">viewstack</property>
+              </object>
+            </property>
+          </object>
+        </child>
+        <property name="content">
+          <object class="AdwViewStack" id="viewstack"></object>
+        </property>
+        <child type="bottom">
+          <object class="AdwViewSwitcherBar" id="switcher_bar">
+            <property name="stack">viewstack</property>
+          </object>
+        </child>
+      </object>
+    </property>
+  </template>
+  <menu id="primary_menu">
+    <section>
+      <item>
+        <attribute name="label" translatable="yes">_Preferences</attribute>
+        <attribute name="action">app.preferences</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">_Keyboard Shortcuts</attribute>
+        <attribute name="action">win.show-help-overlay</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">_Help</attribute>
+        <attribute name="action">app.help</attribute>
+      </item>
+      <item>
+        <attribute name="label" translatable="yes">_About Gnomeframe</attribute>
+        <attribute name="action">app.about</attribute>
+      </item>
+    </section>
+  </menu>
+</interface>