Move investments executions view to a component

Note that we're changing the component so it uses `polymorphic_path`;
that way we don't have to pass the `@budget` variable to the component.
We could also use `budget_investment_path investment.budget, investment`
instead.

app/components/budgets/executions/investments_component.html.erb

@@ -0,0 +1,26 @@
+<% investments_by_heading.each do |heading, investments| %>
+  <h4 id="<%= heading.name.parameterize %>">
+    <%= heading.name %> (<%= investments.count %>)
+  </h4>
+  <div class="row" data-equalizer-on="medium" data-equalizer>
+    <% investments.each do |investment| %>
+      <div class="small-12 medium-6 large-4 column end margin-bottom">
+        <div class="budget-execution" data-equalizer-watch>
+          <%= render Budgets::Executions::ImageComponent.new(investment) %>
+          <div class="budget-execution-info">
+            <div class="budget-execution-content">
+              <h5>
+                <%= link_to investment.title,
+                            polymorphic_path(investment, anchor: "tab-milestones") %>
+              </h5>
+              <span class="author"><%= investment.author.name %></span>
+            </div>
+            <p class="price margin-top text-center">
+              <strong><%= investment.formatted_price %></strong>
+            </p>
+          </div>
+        </div>
+      </div>
+    <% end %>
+  </div>
+<% end %>

app/components/budgets/executions/investments_component.rb

@@ -0,0 +1,7 @@
+class Budgets::Executions::InvestmentsComponent < ApplicationComponent
+  attr_reader :investments_by_heading
+
+  def initialize(investments_by_heading)
+    @investments_by_heading = investments_by_heading
+  end
+end