FlashFS 1.0.2 Project rename and build fixes - Rename the project/flash ROM to the consistent "flashfs" nomenclature: flashfs.6502 -> flashfs.rom, build.sh, CI artifact and deployment paths, integration tests, and docs - Fix build script and artifact paths in the CI configuration; drop the unused SSD output from CI - Refactor integration tests to the "flashfs" naming (harness paths, README, scripts) - No ROM code changes; ROM version stays 1.00 (1.0.x shares major.minor)