Add object templates for generating new facts

  * previously pdk did not support creating facts.  Now that
    it does we need the proper object templates to support generating
    facts and fact test files.

object_templates/fact.erb

+Facter.add(:<%= name %>) do
+  # https://puppet.com/docs/puppet/6.19/fact_overview.html
+  setcode do
+     'hello facter'
+  end
+end

object_templates/fact_spec.erb

+require 'spec_helper'
+require 'facter'
+require 'facter/<%= name %>'
+
+describe :'<%= name %>', type: :fact do
+  subject(:fact) { Facter.fact(:'<%= name %>') }
+
+  before :all do
+    # perform any action that should be run for the entire test suite
+  end
+
+  before :each do
+    # perform any action that should be run before every test
+    Facter.clear
+  end
+
+  it 'should return a value' do
+    expect(fact.value).to eq('hello facter')  
+  end
+end