feat: :zap: Add pkl file converter and visualizer
Add a pkl file converter and visualizer for RIXS data
fix: :recycle: Define constant instead of duplicating
fix: :recycle: Replace `_ReadableFileobj` by `Any`
`_ReadableFileobj` cannot be access due to the __all__ command in pickle
fix: :recycle: Refactors and Type-Fixes
fix: :recycle: Replace `G` by `graph`
fix: :green_heart: Removed `python 3.7`
fix: :bug: Change `int` to `str`
docs: :memo: Add comment about `home-dir` for docker
test: :arrow_up: increase coverage
test: :arrow_up: increase coverage
fix: :pencil2: Fix typo for args
test: :rocket: Increase coverage
test: :arrow_up: Increase coverage by testing `_convert`
test: :arrow_up: Increase coverage
fix: :test_tube: Missing coverage of `print_confidence_interval`
