Add ability to read from Confluence

[wesley-dean-flexion]

As a QPP Engineer, so that I may interact with content found in Confluence, I would like the ability to read / search pages in Confluence using FCLI.

This is similar to #84 (read tickets from Jira), but for Confluence. As with the Jira ticket, there would be a single read function that would accept CQL and return the results in some format that could be further processed (e.g., JSON). A "read" would be a search where the CQL specifies a single pageid and multiple (most?) fields; a typical "search" would return a default subset of fields from what a typical "read" would return.