Function compile_pack_agents 

pub fn compile_pack_agents(
    manifest: &PackManifest,
    markdown_docs: &[MarkdownDoc],
) -> Vec<CompiledPackAgentConfig>

Compile pack agent bindings to toolsets with extracted markdown metadata.

This function transforms manifest agent definitions into runtime-ready configurations, combining TOML settings with markdown-extracted metadata. All reference validations (profile, adapter, format, toolsets) have been performed during the IR validation phase.