Move log parsing page to logs section of docs

What does this MR do?

1. Created a folder for Logs to prepare for nesting of the Parsing GitLab logs with jq page under it.
2. Move the Parsing GitLab logs with jq page into the Logs folder.

Related issues

#366668 (closed)

Moving docs to a new location?

Read the guidelines: https://docs.gitlab.com/ee/development/documentation/index.html#move-or-rename-a-page

• Make sure the old link is not removed and has its contents replaced with a link to the new location.
• Make sure internal links pointing to the document in question are not broken.
• Search and replace any links referring to old docs in GitLab Rails app, specifically under the app/views/ and ee/app/views (for GitLab EE) directories.
• Make sure to add redirect_from to the new document if there are any Disqus comments on the old document thread.
• Update the link in features.yml (if applicable).
• Assign one of the technical writers for review.