4.4.1

Special thanks to the contributors that made this release happen: @artivis, @cjp256, @kenvandine, @sergiusens and @xnox

Full list of changes

• tools: split local environment setup from environment-setup.sh @cjp256 (#3366)
• extensions: use SNAP_COMMON instead of SNAP_DATA for fonts @sergiusens (#3361)
• cli: allow snap-id for validate @sergiusens (#3349)
• project schema tests: ensure json format checkers are loaded @cjp256 (#3357)
• tests: import sort with isort @cjp256 (#3352)
• Fix colcon v1 workspace sourcing @artivis (#3358)
• cli: import sort with isort @cjp256 (#3354)
• tools: import sort with isort @cjp256 (#3353)
• storeapi: import sort with isort @cjp256 (#3351)
• include SNAPCRAFT_STAGE in XDG_DATA_DIRS, needed to find Gir files built by other parts @kenvandine (#3340)
• cli,plugins: assume that core22 base wants v2 plugins. @xnox (#3337)
• Fix rosdep ROS_PYTHON_VERSION @artivis (#3346)
• pyproject: add isort with black-compatible configuration @cjp256 (#3344)
• repo: move apt ppa helpers into apt_ppa module @cjp256 (#3341)
• unit tests: mock os.environ.copy() for deb tests @cjp256 (#3342)