Asm 0.6.0

• Consolidate hello and math into one project each, with seven target subdirectories and one manifest.
• Add selected-target standalone Linux builds, isolated outputs, and test builds without execution.
• Add target-specific exact dependencies in v2 locks while retaining v1 compatibility.
• Validate every project recipe and lock row before changing artifacts or dependency state.
• Reject response-file source and checker paths before invoking build tools.
• Link assembly projects against named native libraries with optional compile-only ABI checks.
• Preserve native manifest syntax, v1 locks, legacy archive limits, and earlier published release bytes.

See the release notes and multi-target project contract.