documentation

Pull request #2326: Feature/ZBX-23898 7.3 D

Merge in WEB/documentation from feature/ZBX-23898-7.3-D to release/7.4

* commit '7873420f0d97c5e1e5e5603fc386922d9017a33f': (23 commits)
  ZBX-23898 corrected a sentence, added a link to the guide on the Quick reference guides page.
  ZBX-23898 removed camelcase from the name, paraphrased and clarified sentences.
  ZBX-23898 corrected commands for agent 2.
  ZBX-23898 fixed mistakes, added relevant link, deleter irrelevant link, clarified guide name, deleted illogical sentences, added setup guide for agent 2, clarification regarding the plugin.
  ZBX-23898 deleted redundant link.
  ZBX-23898 changed monitoring multiple websites section.
  fixed minor grammar issues
  ZBX-23898 screenshots, sentence structure and clarity improvements.
  ZBX-23898 paraphrased a sentence.
  ZBX-23898 fixed codeblock.
  ZBX-23898 code block fix.
  ZBX-23898 fixed code block.
  ZBX-23898 another codeblock formatting attempt.
  ZBX-23898 codeblock formatting attempt.
  ZBX-23898 fixing code blocks.
  ZBX-23898 formatting fixes.
  ZBX-23898 updated screenshot.
  ZBX-23898 formatting, adding missing dots.
  ZBX-23898 picture update, guide clarifications.
  ZBX-23898 picture update, sentence paraphrasing, error corrections, formatting improvements.
  ...