[Electron] Add basic welcome screen (#1491)

* WIP

* Add LogTerminal

* Modify server startup view

* Add installView

* Add basic welcome screen and dev server setup

* nit

* nit

* nit

* nit

* nit

src/components/install/WelcomeScreen.vue

@@ -0,0 +1,47 @@
+<template>
+  <div class="flex flex-col items-center justify-center gap-8 p-8">
+    <!-- Header -->
+    <h1 class="text-4xl font-bold text-neutral-100">Welcome to ComfyUI</h1>
+
+    <!-- Get Started Button -->
+    <Button
+      label="Get Started"
+      icon="pi pi-arrow-right"
+      iconPos="right"
+      size="large"
+      @click="$emit('start')"
+      class="p-4 text-lg"
+    />
+
+    <!-- Installation Steps -->
+    <div class="w-[600px]">
+      <Steps :model="installSteps" :readonly="true" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import Steps from 'primevue/steps'
+import Button from 'primevue/button'
+
+const installSteps = [
+  {
+    label: 'Install Location',
+    icon: 'pi pi-folder'
+  },
+  {
+    label: 'Migration',
+    icon: 'pi pi-download'
+  },
+  {
+    label: 'Desktop Settings',
+    icon: 'pi pi-desktop'
+  },
+  {
+    label: 'Review',
+    icon: 'pi pi-check'
+  }
+]
+
+defineEmits(['start'])
+</script>