Dissect.jffs

What's Changed
* Only run CI on PR and main branch pushes by Schamper in https://github.com/fox-it/dissect.jffs/pull/2

New Contributors
* Schamper made their first contribution in https://github.com/fox-it/dissect.jffs/pull/2

**Full Changelog**: https://github.com/fox-it/dissect.jffs/compare/1.0...1.1

What's Changed
* Add JFFS2 implementation by JSCU-CNI in https://github.com/fox-it/dissect.jffs/pull/1

New Contributors
* JSCU-CNI made their first contribution in https://github.com/fox-it/dissect.jffs/pull/1

**Full Changelog**: https://github.com/fox-it/dissect.jffs/commits/1.0