add: user project trends

app/controllers/users/project_trends_controller.rb

@@ -0,0 +1,11 @@
+class Users::ProjectTrendsController < Users::BaseController 
+
+  def index 
+    if params[:date].present?
+      @project_trends = observed_user.project_trends.where("DATE(created_at) = ?", params[:date])
+    else 
+      @project_trends = observed_user.project_trends
+    end
+    @project_trends = kaminari_paginate(@project_trends.includes(:trend, :project).order(created_at: :desc))
+  end
+end