some fixes

cmd/cli/main.go

@@ -24,6 +24,8 @@ Flags:
   --build <name>     run only the named structured build (use with matrix CI)
   --list-builds      print the names of structured builds in the suite as JSON
   --list-matrix      print the full (build, toolchain, platform) matrix as JSON
+  --test <name>		 run tests with specific group/name or glob
+  --group <name>	 run all tests from <name> group
   --help             show help
 
 Example:
@@ -32,6 +34,9 @@ Example:
   judge lab1.jdg ./student-solution --build=sanitized
   judge --list-builds lab1.jdg
   judge aggregate reports/
+  judge suite.jdg . --test "basic/*"
+  judge suite.jdg . --test "*/timeout"
+  judge suite.jdg . --group "basic"
 `
 
 func main() {