Signed-off-by: James Hamlin <jfhamlin@gmail.com>

Signed-off-by: James Hamlin <jfhamlin@gmail.com>

Signed-off-by: James Hamlin <jfhamlin@gmail.com>

Signed-off-by: James Hamlin <jfhamlin@gmail.com>

This change integrates the test runner directly into the main glj command
using the -m flag, matching Clojure's standard behavior for running
namespace -main functions.

Changes:
- Add -m/--main flag support to gljmain.go to run namespace -main functions
- Add parse-args function to test_runner.glj for CLI argument processing
- Update test_runner.glj -main to handle command-line arguments
- Update Makefile test targets to use 'glj -m glojure.test-runner'
- Remove cmd/glj-test directory as standalone runner is no longer needed

The test runner can now be invoked with:
  glj -m glojure.test-runner [options]

This follows the standard Clojure convention and eliminates the need
for a separate test runner binary.

This fixes a critical bug where AOT-compiled namespaces would reinitialize
their vars (including *loaded-libs*) when required multiple times, causing
test failures when using the test runner with dynamic bindings.

Problem:
- When clojure.data.generators required clojure.core, the AOT loader
  would reinitialize *loaded-libs*, removing previously loaded namespaces
- This caused clojure.test to be reloaded inside the test runner's
  binding of t/report, leading to "no such method AddMethod" errors
  when defmethod tried to add methods to a bound function

Solution:
- Made AOT loaders idempotent by checking namespace metadata before
  initializing
- Each LoadNS() function now:
  1. Checks if namespace has :aot-loaded metadata
  2. Returns immediately if already loaded
  3. Sets :aot-loaded metadata after initialization
- This preserves *loaded-libs* and all other dynamic vars across
  multiple requires

Changes:
- Modified pkg/runtime/codegen.go to generate idempotent LoadNS functions
- Regenerated all AOT loader files with the new logic
- Updated Makefile test targets (from previous commit)

This ensures AOT namespaces are only initialized once, preventing the
corruption of global state like *loaded-libs* and fixing the multimethod
binding issues in the test runner.