Feature/mvp interview survey (#4549)

## Because
<!-- Summarize the purpose or reasons for this PR, e.g. what problem it
solves or what benefit it provides. -->
- We need a feature flag to hide the interview survey feature behind. 

## This PR
<!-- A bullet point list of one or more items describing the specific
changes. -->
- Creates route, controller, view, and updates flipper gates
- Adds feature flag check to controller
- System test coverage for feature flag behavior to ensure no one can
access the feature if it is disabled

## Issue
<!--
If this PR closes an open issue in this repo, replace the XXXXX below
with the issue number, e.g. Closes #2013.

If this PR closes an open issue in another TOP repo, replace the #XXXXX
with the URL of the issue, e.g. Closes
https://github.com/TheOdinProject/curriculum/issues/XXXXX

If this PR does not close, but is related to another issue or PR, you
can link it as above without the 'Closes' keyword, e.g. 'Related to
#2013'.
-->
Related to #4524  

~~Missing tests that were called for in that issue.~~ There are now two
system tests.

## Additional Information
<!-- Any other information about this PR, such as a link to a Discord
discussion. -->

~~The feature flag does work correctly in the view, but I'm not getting
a redirect to work in the controller if the feature is disabled. It
still renders the page as if the feature was enabled.~~ This is
resolved.

app/controllers/interview_surveys_controller.rb

@@ -0,0 +1,12 @@
+class InterviewSurveysController < ApplicationController
+  def new
+    unless Feature.enabled?(:survey_feature, current_user)
+      redirect_to dashboard_path, notice: 'Feature not enabled'
+    end
+  end
+
+  def create
+    # puts params[:survey]
+    redirect_to dashboard_path, notice: 'Survey Submitted'
+  end
+end

app/views/interview_surveys/new.html.erb

@@ -0,0 +1,11 @@
+<%= title('Interview Survey') %>
+
+<div>
+  <div class="page-container">
+    <h1 class="page-heading-title">Interview Survey</h1>
+
+    <div class='max-w-xl mx-auto'>
+      <%# where form will be rendered %>
+    </div>
+  </div>
+</div>

config/routes.rb

@@ -105,4 +105,5 @@
 
   resources :notifications, only: %i[index update]
   resource :themes, only: :update
+  resources :interview_surveys, only: %i[new create]
 end

db/migrate/20240530151357_change_flipper_gates_value_to_text.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class ChangeFlipperGatesValueToText < ActiveRecord::Migration[7.0]
+  def up
+    # Ensure this incremental update migration is idempotent
+    return unless connection.column_exists? :flipper_gates, :value, :string
+
+    if index_exists? :flipper_gates, %i[feature_key key value]
+      remove_index :flipper_gates, %i[feature_key key value]
+    end
+    change_column :flipper_gates, :value, :text
+    add_index :flipper_gates, %i[feature_key key value], unique: true, length: { value: 255 }
+  end
+
+  def down
+    change_column :flipper_gates, :value, :string
+  end
+end

spec/system/interview_survey_spec.rb

@@ -0,0 +1,28 @@
+require 'rails_helper'
+
+RSpec.describe 'Interview survey' do
+  let(:user) { create(:user) }
+
+  before do
+    sign_in(user)
+  end
+
+  context 'when the feature is enabled' do
+    before do
+      Flipper.enable(:survey_feature)
+    end
+
+    it 'shows the survey' do
+      visit new_interview_survey_path
+      expect(page).to have_content('Interview Survey')
+    end
+  end
+
+  context 'when the feature is disabled' do
+    it 'redirects to the dashboard' do
+      visit new_interview_survey_path
+      expect(page).to have_content('Feature not enabled')
+      expect(page).to have_current_path(dashboard_path)
+    end
+  end
+end