HTML report and new normalisation methods

• added function generate_plate_report generating the html report
• added nMFI normalisation type
• added an option to include raw MFI in the output of process_plate function
• renamed output of the model to RAU (Relative Antibody Unit), which should be more interpretable for human
• simple censoring of the extrapolation

Refactor for faster processing time and simpified usage

• refactored the whole package structure to simplify the usage
• new, much faster parser for the xPONENT and INTELLIFLEX files
• model encapsulation for the standard curve fitting
• new plots - MFI chart and layout plot
• updated blank adjustment function
• error fixes

v0.0.4

This release consists mainly of small patches and fixes required for the package to be published on the CRAN repository, e.g:

• standardized DESCRIPTION formatting
• not changing user options and avoiding saving files in examples and unit tests
• correct linting
  Additionally, we added some more small adjustments, such as:
• prettier pkgdown reference page
• vignette fixes
• issue templates