Recurring transactions (#271)

* Implement recurring transactions support

* Amount fix

* Hide section when any filter is applied

* Add automatic identify feature

Automatic identification runs after:
  - CSV Import completes (TransactionImport, TradeImport, AccountImport, MintImport)
  - Plaid sync completes
  - SimpleFIN sync completes
  - LunchFlow sync completes
- Any new provider that we create.

* Fix linter and tests

* Fix address review

* FIX proper text sizing

* Fix further linter

Use circular distance to handle month-boundary wrapping

* normalize to a circular representation before computing the median

* Better tests validation

* Added some UI info

Fix pattern identification, last recurrent transaction needs to happened within the last 45 days.

* Fix styling

* Revert text subdued look

* Match structure of the other sections

* Styling

* Restore positive amounts styling

* Shorten label for UI styling

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Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

app/views/settings/_settings_nav.html.erb

@@ -17,7 +17,8 @@ nav_sections = [
       { label: t(".categories_label"), path: categories_path, icon: "shapes" },
       { label: t(".tags_label"), path: tags_path, icon: "tags" },
       { label: t(".rules_label"), path: rules_path, icon: "git-branch" },
-      { label: t(".merchants_label"), path: family_merchants_path, icon: "store" }
+      { label: t(".merchants_label"), path: family_merchants_path, icon: "store" },
+      { label: t(".recurring_transactions_label"), path: recurring_transactions_path, icon: "repeat" }
     ]
   },
   (