Package structure + check

[seabbs]

Sorry quite a few random changes in here. All minor though.

• Add dockerfile to rbuildignore (not gitignore as in commit log)
• Update all vignettes to reflect recent updates
• Clean up suggests (dropping tidyverse and adding actual suggests)
• Move suggests from Imports -> Suggests
• Remove local docs (github actions builds on gh-pages -> need to change to point at this in settings
• Bump version
• Clean up package description for CRAN requirements (closing #7 when combined with earlier changes)
• Merge description into README
• Added links to description
• Add CRAN install to readme
• Adds a region filter to readInEpiNow2
• Adds globalvariables to reduce check noise
• Add joinRtData (closing #21)
• Add github actions to make docs and build a docker container (closing #5)

To do

• [x] Make clean gh-pages branch to push new docs to
• [x] Point github pages at gh-pages branc.

[hamishgibbs]

Thanks, reviewing locally now

[hamishgibbs]

Looks good to me - thank you for your help cleaning up for CRAN