docs: clarify combinable --verbose and --locale options across all READMEs

[Timcai06]

This PR improves documentation clarity by explicitly stating that --verbose (-v) and --locale (-l) can be used together.

Changes included:

• Added a usage tip under the Code Analysis options table in:
  • README.md
  • README_ZH.md
  • README_RU.md
• Added the same type of usage tip under the AI Code Review options table in all three README files.
• Included concrete combined-command examples (e.g. ... -v -l zh / ... -v -l ru).

Why this change:

• The docs previously listed -v and -l separately, which could make combined usage unclear.
• This update reduces confusion and improves first-time user experience without changing runtime behavior.