Add dictionary controller with index route

app/controllers/dictionary_controller.rb

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+class DictionaryController < ApplicationController
+  def index
+    @parts_of_speech = PartOfSpeech.all
+  end
+end

app/helpers/dictionary_helper.rb

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+module DictionaryHelper
+end

app/models/part_of_speech.rb

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+class PartOfSpeech < ApplicationRecord
+end

app/views/dictionary/index.html.erb

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+<h1>Dictionary#index</h1>
+<p>Find me in app/views/dictionary/index.html.erb</p>
+
+<p><%= @parts_of_speech.count %> parts of speech entries in database</p>
+<h1>Parts of Speech</h1>
+<table>
+  <tr>
+    <td><b>Part of Speech</b></td>
+    <td><b>Definition</b></td>
+  </tr>
+<% @parts_of_speech.each do |item| %>
+  <tr>
+    <td><%= item.pos %></td>
+    <td><%= item.definition %></td>
+  </tr>
+<% end %>
+</table>