Nimpa

- support docker builds (31 <- https://github.com/NiftyPET/NIPET/issues/48)

- fix build (30 <- https://github.com/NiftyPET/NiftyPET/issues/19)
- docs: fix CI badge

- fixed potential problem with radioactivity injection time in `dcmsort()` (29)
- minor CI/CD build updates
+ mark `stable`
+ use release bot

- add `acr` module (28)
- add `img.signa` module (28)
- misc `prc` & `img` updates (28)
- fix/migrate `pkg_resources` => `importlib_resources`
- misc code tidy
- misc build/CI/framework/test updates
+ fix CI build & test workflow
+ add Py3.11, drop Py3.6 support
+ migrate `setup.cfg` => `pyproject.toml`
+ update pre-commit hooks

- better grouping of DICOM info (27)
- minor bugfixes (27)
- update build/test framework (27)
+ bump `ninst>=0.12.0` to drop `tkinter` installation dependency & for `mcr` constants
+ add py3.10 support
+ fix external PR tests

- fix misc bugs (26)
- misc `dcmsort` & `dcminfo` updates
+ make acquisition time optional
+ use `pathlib`
+ fix tracer name bug
+ add injection time
+ data type correction
+ add (rounded) frame duration
+ 1 second tag time resolution
+ add acquisition time
+ support more file extensions
+ add study date
+ update sorting (group series by description or description + time)
- `imtrimup`: change default to `outpath=None`
- add `rem_chars` to sanitise folder/file names