[Tracking] Abstract Common CLI Packages

[darcyclarke]

Exit Criteria

• Identify areas to abstract into separate libraries (ex. IOStreams, TablePrinter)

References

• Refactor (or replicate) common CLI packages into separate module for binary extension developers #4264
• [Discussion] Desired features go-gh#5

[mislav]

Agreed-upon candidates for extraction:

• git client Extract concepts of local and remote git repos #4900
  • git remotes context
• table printer Extract table printer from CLI go-gh#61
• IO streams
• Browser Migrate browser package from gh go-gh#62
• Go --template export Extract export package from gh go-gh#67
• Markdown renderer Add markdown renderer from gh go-gh#66
• FuzzyAgo time helper (e.g. "3m ago") Extract text package from gh go-gh#69
• text utils - indent, sanitize, truncate Extract text package from gh go-gh#69