Adding GitHub issue labels

[efletcherPIFSC]

Suggestion to add labels to the repository. It is optional, but will help tag discussion posts.

Here are the following examples I have for the ageproj project, and another example that the r4ss community has with their project:

ageproj labels

label	description
docs: Reference Manual
documentation	Improvements or additions to documentation
duplicate	This issue or pull request already exists
enhancement	New feature or request
feature: Bootstrap
feature: Harvest
feature: Options
feature: Recruitment
feature: Stochastic
help wanted	Extra attention is needed
invalid	This doesn't seem right
question	Further information is requested
todo: low priority
topic: cli	Command Line Interface
topic: INP input file	AGEPRO *.INP input file name format
topic: json	JSON related issues
wontfix	This will not be worked on

r4ss labels

label	description
bug
documentation
duplicate
enhancement
epic: running models
guidance	Information related to running Stock Synthesis or using {r4ss}.
help wanted
in progress
low priority	A low-priority item that does NOT have to be worked on
needs testing	temporary label to be removed from a specific issue once testing is complete
open-ended	issues that may not have a clear resolution and are kept around as reminders for the future
output	issues related to output processing
plots	issues related to plots
question	quick fix
shiny
SS_read/SS_write
functions	related to reading and writing the SS input files
ss3_utility_functions	issues related to common stock assessment workflow functions (that isn't plotting or read/write)
style/refactor	issues related to cleaning up the code that won't change the user experience
testing	issues related to automated testing and testthat