CSV Imports Overhaul (Transactions, Trades, Accounts, and Mint import support) (#1209)

* Remove stale 1.0 import logic and model

* Fresh start

* Checkpoint before removing nav

* First working prototype

* Add trade, account, and mint import flows

* Basic working version with tests

* System tests for each import type

* Clean up mappings flow

* Clean up PR, refactor stale code, tests

* Add back row validations

* Row validations

* Fix import job test

* Fix import navigation

* Fix mint import configuration form

* Currency preset for new accounts

db/migrate/20240921170426_change_import_owner.rb

@@ -0,0 +1,28 @@
+class ChangeImportOwner < ActiveRecord::Migration[7.2]
+  def up
+    add_reference :imports, :family, foreign_key: true, type: :uuid
+    add_column :imports, :original_account_id, :uuid
+
+    execute <<-SQL
+      UPDATE imports
+      SET family_id = (SELECT family_id FROM accounts WHERE accounts.id = imports.account_id),
+          original_account_id = account_id
+    SQL
+
+    remove_reference :imports, :account, foreign_key: true, type: :uuid
+    change_column_null :imports, :family_id, false
+  end
+
+  def down
+    add_reference :imports, :account, foreign_key: true, type: :uuid
+
+    execute <<-SQL
+      UPDATE imports
+      SET account_id = original_account_id
+    SQL
+
+    remove_reference :imports, :family, foreign_key: true, type: :uuid
+    remove_column :imports, :original_account_id, :uuid
+    change_column_null :imports, :account_id, false
+  end
+end