Enhancement/run app via package installation

[Gotfrid]

Issue

Closes #122

Description

This changes brings ability to run the app after installing the package - without cloning the repository.

Changes:

• update `aNCA::run_app()
  • add ... to the signature to be able to pass arguments to shiny::runApp() such as host, port, etc
  • remove all import comments due to their redundant nature: the app should require all imports that are listed in the packages NAMESPACE file
  • call require() insider the function to load all required libraries
• fixes:
  • move TLG data sample into inst folder, so that it can be properly loaded by the package
  • export some utility functions that are used by the app

Definition of Done

• user can install the package from github via pak::pak("pharmaverse/aNCA")
• user can run the app via aNCA::run_app()
• README contains information on how to install & run the app
• Package version is bumped

How to test

Single command to test the app via package installation (requires docker):

docker run --rm -it -p 3838:3838 rocker/r-ver:latest bash -c "apt update && apt install libcurl4-openssl-dev && Rscript -e \"install.packages('pak'); pak::pak('pharmaverse/aNCA@enhancement/run-app-via-package-installation')\" && Rscript -e \"aNCA::run_app(host='0.0.0.0',port=3838)\""

Alternatively, install the package in your environment via pak from this branch:

pak::pak('pharmaverse/aNCA@enhancement/run-app-via-package-installation')

Contributor checklist

• Code passes lintr checks
• Code passes all unit tests
• New logic covered by unit tests
• New logic is documented

Notes to reviewer

Please perform the functional testing rigorously - I only tested it with the slopes - area, that I am somewhat familiar with. There might be a chance that some packages were not properly put into the NAMESPACE, and due to that are not loaded in the app.