feat(ui): add multi-select and batch capabilities

This introduces the core functionality for batch operations on images and multiple selection in the gallery/batch manager.

A number of other substantial changes are included:
- `imagesSlice` is consolidated into `gallerySlice`, allowing for simpler selection of filtered images
- `batchSlice` is added to manage the batch
- The wonky context pattern for image deletion has been changed, much simpler now using a `imageDeletionSlice` and redux listeners; this needs to be implemented still for the other image modals
- Minimum gallery size in px implemented as a hook
- Many style fixes & several bug fixes

TODO:
- The UI and UX need to be figured out, especially for controlnet
- Batch processing is not hooked up; generation does not do anything with batch
- Routes to support batch image operations, specifically delete and add/remove to/from boards

invokeai/frontend/web/.eslintrc.js

@@ -36,6 +36,12 @@ module.exports = {
     ],
     'prettier/prettier': ['error', { endOfLine: 'auto' }],
     '@typescript-eslint/ban-ts-comment': 'warn',
+    '@typescript-eslint/no-empty-interface': [
+      'error',
+      {
+        allowSingleExtends: true,
+      },
+    ],
   },
   settings: {
     react: {