documentation

Pull request #2021: feature/ZBX-23900-7.0-D2. updated images & examples to follow tag policy; refined "Tagging" page; added note with links to tag policy.

Merge in WEB/documentation from feature/ZBX-23900-7.0-D2 to release/7.0

* commit 'da46e0c06f957bace5b61359ef40022d0dc188d5':
  [ZBX-23900] fixed link
  [ZBX-23900] restored image to be updated in ZBX-25087
  [ZBX-23900] improved wording & formatting (tagging.md)
  [ZBX-23900] added note with links to tag policy
  [ZBX-23900] improved "Macro support" section wording & formatting (tagging.md)
  [ZBX-23900] improved "Macro support" section paragraph order (tagging.md)
  [ZBX-23900] merged paragraphs in "Macro support" section (tagging.md)
  [ZBX-23900] improved "Viewing event tags" section wording & formatting (tagging.md)
  [ZBX-23900] improved "Substring extraction" section wording & formatting (tagging.md)
  [ZBX-23900] improved "Configuration" section wording & formatting (tagging.md)
  [ZBX-23900] improved "Use cases" section wording & formatting (tagging.md)
  [ZBX-23900] improved "Use cases" section use case order (tagging.md)
  [ZBX-23900] improved "Overview" section wording & formatting (tagging.md)
  [ZBX-23900] improved page structure and .md readability (tagging.md)
  [ZBX-23900] made line breaks pretty (tagging.md)
  [ZBX-23900] updated API examples to follow tag policy
  [ZBX-23900] updated images & examples to follow tag policy