feat: add QIF import

app/import_presets/qif_standard/config.yml

@@ -0,0 +1,9 @@
+settings:
+  file_type: qif
+  importing: transactions
+  date_format: "%d/%m/%Y"
+  skip_errors: true
+
+mapping: {}
+
+deduplicate: []

app/import_presets/qif_standard/manifest.json

@@ -0,0 +1,7 @@
+{
+    "author": "eitchtee",
+    "description": "Standard QIF Import. Mapping is automatic.",
+    "schema_version": 1,
+    "name": "Standard QIF",
+    "message": "Account is inferred from filename (e.g., 'Checking.qif' -> Account 'Checking').\nYou might need to change the date format to match the date format on your file."
+}