Attach documents to expenses (#64)

* Upload documents to receipts

* Improve documents

* Make the feature opt-in

* Fix file name issue

prisma/migrations/20240128202400_add_doc_info/migration.sql

@@ -0,0 +1,10 @@
+/*
+  Warnings:
+
+  - Added the required column `height` to the `ExpenseDocument` table without a default value. This is not possible if the table is not empty.
+  - Added the required column `width` to the `ExpenseDocument` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE "ExpenseDocument" ADD COLUMN     "height" INTEGER NOT NULL,
+ADD COLUMN     "width" INTEGER NOT NULL;