Gets the full loaded skill set for a task execution.
Unlike getSkillsForTask, this returns the complete LoadedSkillSet
including execution order and missing required information.
The agent that will execute the task
The task to get skills for
The skill loader to use
Result with LoadedSkillSet or SkillLoaderError on failure
Skills module exports (Voyager-style skill library) - Issue #528 Split from agents.ts for file size compliance (Issue #285)