feat(delivery): replace deliveryEditorSlice with automat and add PDF/text attachment handling

- replace Redux deliveryEditorSlice with deliveryEditorAutomat using automat
- add Attachment and AttachmentList components in Kopfdaten
- extract PDF text via pdftotext-wasm and render PDF thumbnails with pdfjs-dist
- add TextEditorDialog to view and edit extracted text files (preformatted monospace, no wrap)
- configure Vite server.fs.allow for pdftotext.wasm

package.json

@@ -22,8 +22,11 @@
     "@mui/material": "^9.4.0",
     "@reduxjs/toolkit": "^2.12.0",
     "@shopify/draggable": "^1.2.1",
-    "notistack": "^3.0.2",
+    "automat": "file:../automat",
     "dashgui": "file:../dashgui",
+    "notistack": "^3.0.2",
+    "pdfjs-dist": "^6.3.289",
+    "pdftotext-wasm": "file:../pdftotext-wasm",
     "react": "^19.3.0",
     "react-dom": "^19.3.0",
     "react-redux": "^9.3.0",