linear v2: Simple Mode (#7734)

A major, full rewrite of linear mode, now under the name "Simple Mode". 
- Fixes widget styling
- Adds a new simplified history
- Adds support for non-image outputs
- Supports right sidebar
- Allows and panning on the output image preview
- Provides support for drag and drop zones
- Moves workflow notes into a popover.
- Allows scrolling through outputs with Ctrl+scroll or arrow keys

The primary means of accessing Simple Mode is a toggle button on the
bottom right. This button is only shown if a feature flag is enabled, or
the user has already seen linear mode during the current session. Simple
Mode can also be accessed by
- Using the toggle linear mode keybind
- Loading a workflow that that was saved in Simple Mode workflow
- Loading a template url with appropriate parameter

<img width="1790" height="1387" alt="image"
src="https://github.com/user-attachments/assets/d86a4a41-dfbf-41e7-a6d9-146473005606"
/>

Known issues:
- Outputs on cloud are not filtered to those produced by the current
workflow.
  - Output filtering has been globally disabled for consistency
- Outputs will load more items on scroll, but does not unload
- Performance may be reduced on weak devices with very large histories.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7734-linear-v2-2d16d73d3650819b8a10f150ff12ea22)
by [Unito](https://www.unito.io)

src/renderer/extensions/linearMode/ImagePreview.vue

@@ -0,0 +1,44 @@
+<script setup lang="ts">
+import { ref, useTemplateRef } from 'vue'
+
+import ZoomPane from '@/components/ui/ZoomPane.vue'
+
+const { src } = defineProps<{
+  src: string
+  mobile?: boolean
+}>()
+
+const imageRef = useTemplateRef('imageRef')
+const width = ref('')
+const height = ref('')
+</script>
+<template>
+  <ZoomPane v-if="!mobile" v-slot="slotProps" class="flex-1 w-full">
+    <img
+      ref="imageRef"
+      :src
+      v-bind="slotProps"
+      @load="
+        () => {
+          if (!imageRef) return
+          width = `${imageRef.naturalWidth}`
+          height = `${imageRef.naturalHeight}`
+        }
+      "
+    />
+  </ZoomPane>
+  <img
+    v-else
+    ref="imageRef"
+    class="w-full"
+    :src
+    @load="
+      () => {
+        if (!imageRef) return
+        width = `${imageRef.naturalWidth}`
+        height = `${imageRef.naturalHeight}`
+      }
+    "
+  />
+  <span class="self-center md:z-10" v-text="`${width} x ${height}`" />
+</template>