Apache License 2.0 release. Adds the complete Apache-2.0 license and NOTICE to both the repository and installable Skill package, documents the licensing boundary for user images and generated presentations, and keeps third-party dependencies under their respective licenses.\n\nValidation: official Apache-2.0 text matched, 15 license/release packaging tests passed, runtime validation remained green, real PowerPoint build/render/structural QA remained passed, and the final release security audit reported zero failures.\n\nArchive SHA-256: 57910acf8ecd3262841501d4a45fc891c824a56109c6fd163d3a6e10ec7a1b33