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

---------

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

app/controllers/recurring_transactions_controller.rb

@@ -0,0 +1,58 @@
+class RecurringTransactionsController < ApplicationController
+  layout "settings"
+
+  def index
+    @recurring_transactions = Current.family.recurring_transactions
+                                    .includes(:merchant)
+                                    .order(status: :asc, next_expected_date: :asc)
+  end
+
+  def identify
+    count = RecurringTransaction.identify_patterns_for(Current.family)
+
+    respond_to do |format|
+      format.html do
+        flash[:notice] = t("recurring_transactions.identified", count: count)
+        redirect_to recurring_transactions_path
+      end
+    end
+  end
+
+  def cleanup
+    count = RecurringTransaction.cleanup_stale_for(Current.family)
+
+    respond_to do |format|
+      format.html do
+        flash[:notice] = t("recurring_transactions.cleaned_up", count: count)
+        redirect_to recurring_transactions_path
+      end
+    end
+  end
+
+  def toggle_status
+    @recurring_transaction = Current.family.recurring_transactions.find(params[:id])
+
+    if @recurring_transaction.active?
+      @recurring_transaction.mark_inactive!
+      message = t("recurring_transactions.marked_inactive")
+    else
+      @recurring_transaction.mark_active!
+      message = t("recurring_transactions.marked_active")
+    end
+
+    respond_to do |format|
+      format.html do
+        flash[:notice] = message
+        redirect_to recurring_transactions_path
+      end
+    end
+  end
+
+  def destroy
+    @recurring_transaction = Current.family.recurring_transactions.find(params[:id])
+    @recurring_transaction.destroy!
+
+    flash[:notice] = t("recurring_transactions.deleted")
+    redirect_to recurring_transactions_path
+  end
+end