feat(ci): Do sub-validation of projects in bulk runs, UX fixes (#42) * feat(ci): Do sub-validation of projects in bulk runs, UX fixes - Improve validator to run subsidiary tests if content is "addon targeted' - Update to 1.21.30 sample files - Adjust home UX to make "open from file"/"backup" more clear - Refactor how folder delimiters work across IStorage - Fix issue with parsing of JSON with comments - nineslice files - Fix dependency fix up in new project generation - Model geometries can have multiple models; accommodate - Basic blockbench model export * fix(samples): Small fixes in samples and sample loading