[Internal] [Feature] Add README troubleshooting section

[jessicarowell]

Add basic solutions to common problems, e.g.:

• Errors with 'table2asn not on PATH' or a python library missing: the most likely problem is Nextflow is using an outdated cached container.
  Solution: find the container (mine is in $HOME/.singularity/staphb-tostadas-latest.img, delete it, so Nextflow will pull the latest version.

Place an ❌ in a Box that Best Matches the Feature's Importance:

• [] 1 - Most important (absolutely integral and will not use codebase at all without it)
• 2-4 - Moderate (still using codebase for other functions but is serving as a blocker for future use-cases)
• [] 5 - Least important (would like to see but there are no stringent expectations nor urgency for current/future use-cases) 

Any Additional Context or Information? Has There Been Any Progress Made So Far Towards this Request? Any Helpful Resources to Reference? Screenshots or Links?