Rename packaged license files to license.txt
Renames 142 LICENSE.md files and five LICENSE files to license.txt, in their existing directories across all 137 Robot-Body packages. The original license text is preserved byte-for-byte; SPDX identifiers and package IDs/versions are unchanged. Existing .metadata/license.txt files are preserved.
Updates bill-of-materials paths, content hashes, BOM metadata hashes, package hashes, and Package post-validation evidence. Local WRAPP catalogs are updated but not uploaded. No USDs, textures, thumbnails, source assets, or license grants are changed.
All 137 packages pass Package 1.0.0 post-validation and local catalog checks. Three representative installation tests verify byte-for-byte installed content. Every uploaded file is verified against the corrected local plan before this request is marked ready.
This resolves license-filename SCAN.004 findings only. Generated .last_generated files and existing .stl/.urdf files remain unchanged and may still fail scanning; no new Robot-Body validation or benchmark is claimed. Once merged, GitHub submission #257 (batch 1 of 3) and the saved later-batch URLs need to point to the new main commit. Nothing is automatically merged.