feat: add liner integration

lib/integrations/linear/processor_service.rb

@@ -0,0 +1,23 @@
+class Integrations::Linear::ProcessorService
+  pattr_initialize [:account!, :conversation!]
+
+  def create_issue; end
+
+  def link_issue; end
+
+  def list_issues
+    issues = linear_client.list_issues
+    issues.map(&:as_json)
+  end
+
+  private
+
+  def linear_hook
+    @linear_hook ||= account.hooks.find_by!(app_id: 'linear')
+  end
+
+  def linear_client
+    credentials = linear_hook.settings
+    @linear_client ||= Linear.new(credentials['api_key'])
+  end
+end