[Feat] (MG_Backend/DirectGLES): support Flywheel indirect rendering

- Advertise ARB_gpu_shader5 / ARB_multi_bind / ARB_shading_language_420pack /
  ARB_vertex_attrib_binding / ARB_shader_image_size so LWJGL reports
  SUPPORTS_INDIRECT.
- New LowerDrawParametersPass demotes DrawIndex/BaseInstance/BaseVertex
  builtins to Private globals (mg_DrawID/mg_BaseInstance/mg_BaseVertex) for
  the ESSL transpile; SPIRV-Cross otherwise throws for ES profiles. The
  program manager promotes the emitted globals to uniforms and feeds them
  per (sub-)draw.
- Indirect draws now execute natively on the GPU (glDrawElementsIndirect /
  glDrawArraysIndirect per command) when an indirect buffer is bound, so
  compute-written command fields (Flywheel culling updates instanceCount)
  are honored; detects GL_EXT_base_instance and falls back to the CPU loop
  when the command's baseInstance cannot be consumed natively.
- Sync SSBO binding points for graphics draws, not just compute (Flywheel
  vertex shaders read instance data from SSBOs).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

MobileGL/MG_Backend/DirectGLES/BackendObject_DirectGLES.cpp

@@ -788,7 +788,9 @@ namespace MobileGL::MG_Backend::DirectGLES {
                                    E_GL_EXT_framebuffer_object, E_GL_ARB_depth_texture, E_GL_ARB_buffer_storage,
                                    E_GL_ARB_texture_storage, E_GL_ARB_direct_state_access,
                                    E_GL_ARB_multi_draw_indirect, E_GL_ARB_indirect_parameters,
-                                   E_GL_ARB_shader_draw_parameters},
+                                   E_GL_ARB_shader_draw_parameters, E_GL_ARB_gpu_shader5, E_GL_ARB_multi_bind,
+                                   E_GL_ARB_shading_language_420pack, E_GL_ARB_vertex_attrib_binding,
+                                   E_GL_ARB_shader_image_size},
                     .IsCompatibilityProfile = false // Is Compatibility Profile
                 },
             .StaticBackendCapability = {.AllowVSOnlyPrograms = false} // Backend Capability