Fix random docs / pkgdown things

[colearendt]

• [x] NEWS.md has an entry that is missing its "function" definition
• [x] NEWS.md links seem to be wrong...? Not using the doc name reference? https://pkgs.rstudio.com/connectapi/news/index.html
• [ ] improve examples?
• [ ] update CONTRIBUTING.md
• [ ] add an overview page that defines the general structure
  • R6 object
  • helpers
  • tag mechanism (old vs. new)
  • deployment mechanism
  • ACL mechanism
  • get_ helpers and paging
  • browse_ helpers
  • schedule stuff
  • audit_ stuff
• [ ] set up better reference groups in pkgdown
• [ ] see if package docs can point to pagedown
• [ ] deprecate acl stuff (not experimental)
• [ ] can sections have descriptions associated with them?
• [ ] finish off the couple of missing tag functions