documentation

Pull request #2697: ZBX-26310 added info regarding supported data types.

Merge in WEB/documentation from feature/ZBX-26310-7.0-D to release/7.0

* commit 'a68d14298411d8f98d9cdc231068479d9bfb1516':
  ZBX-26310 corrected the title formatting.
  ZBX-26310 removed data types descriptions, moved the section to more suitable location.
  ZBX-26310 corrected the supported data types section.
  ZBX-26310 formatting fixes.
  ZBX-26310 added info regarding supported data types.