Add listIssues tool to server

Author: SamMorrowDrums

pkg/github/server.go

@@ -36,6 +36,7 @@ func NewServer(client *github.Client, readOnly bool, t translations.TranslationH
 	// Add GitHub tools - Issues
 	s.AddTool(getIssue(client, t))
 	s.AddTool(searchIssues(client, t))
+	s.AddTool(listIssues(client, t))
 	if !readOnly {
 		s.AddTool(createIssue(client, t))
 		s.AddTool(addIssueComment(client, t))