Basic Plaid Integration (#1433)

* Basic plaid data model and linking

* Remove institutions, add plaid items

* Improve schema and Plaid provider

* Add webhook verification sketch

* Webhook verification

* Item accounts and balances sync setup

* Provide test encryption keys

* Fix test

* Only provide encryption keys in prod

* Try defining keys in test env

* Consolidate account sync logic

* Add back plaid account initialization

* Plaid transaction sync

* Sync UI overhaul for Plaid

* Add liability and investment syncing

* Handle investment webhooks and process current day holdings

* Remove logs

* Remove "all" period select for performance

* fix amount calc

* Remove todo comment

* Coming soon for investment historical data

* Document Plaid configuration

* Listen for holding updates

app/controllers/plaid_items_controller.rb

@@ -0,0 +1,38 @@
+class PlaidItemsController < ApplicationController
+  before_action :set_plaid_item, only: %i[destroy sync]
+
+  def create
+    Current.family.plaid_items.create_from_public_token(
+      plaid_item_params[:public_token],
+      item_name: item_name,
+    )
+
+    redirect_to accounts_path, notice: t(".success")
+  end
+
+  def destroy
+    @plaid_item.destroy_later
+    redirect_to accounts_path, notice: t(".success")
+  end
+
+  def sync
+    unless @plaid_item.syncing?
+      @plaid_item.sync_later
+    end
+
+    redirect_to accounts_path
+  end
+
+  private
+    def set_plaid_item
+      @plaid_item = Current.family.plaid_items.find(params[:id])
+    end
+
+    def plaid_item_params
+      params.require(:plaid_item).permit(:public_token, metadata: {})
+    end
+
+    def item_name
+      plaid_item_params.dig(:metadata, :institution, :name)
+    end
+end