portfolio-report v0.0.1

Add `portfolio-report` to Gallery (#72)

* Add `portfolio-report` to extensions

* Add portfolio-report to the workflow

* Change `r.requires` version

* Update README and `files`, and fix copy-paste error

* Rewrite manifest for portfolio-report

* Update the manifest part 2

* Add `minimumConnectVersion` to manifest

* Ensure the report is the `primary_rmd`

* Bump R requires version and updated description