Proposed change to Git LFS page

What does this MR do?

I'm proposing some changes to https://docs.gitlab.com/ee/topics/git/lfs/, primarily for clarity. However, I have:

• Rewritten the intro as a Concept topic type
• Moved the image after the instructions to install LFS on the server and client
• Checked my proposed change through Vale. I improved readability from 8.11 to 7.83.

In addition:

• I'm tempted to add a link to OAuth 2 docs (see Line 60), as I'm pretty sure that'll also work as as an HTTPS credential store.
• I would have changed more titles to avoid "ing" verbs (such as "Using Git LFS" -> "Use Git LFS", but I didn't want to break links, and prefer an MVC.
• Before I set up this MR, I used this procedure to build the doc locally: https://gitlab.com/gitlab-org/gitlab-docs/-/blob/main/doc/setup.md

Related issues

Author's checklist

• Optional. Consider taking the GitLab Technical Writing Fundamentals course.
• Follow the:
  • Documentation process.
  • Documentation guidelines.
  • Style Guide.
• If you're adding a new page, add the product tier badge under the H1 topic title.
• If you are a GitLab team member, request a review based on:
  • The documentation page's metadata.
  • The associated Technical Writer.

If you are a GitLab team member and only adding documentation, do not add any of the following labels:

• ~"frontend"
• ~"backend"
• ~"type::bug"
• ~"database"

These labels cause the MR to be added to code verification QA issues.

Reviewer's checklist

Documentation-related MRs should be reviewed by a Technical Writer for a non-blocking review, based on Documentation Guidelines and the Style Guide.

If you aren't sure which tech writer to ask, use roulette or ask in the #docs Slack channel.

• If the content requires it, ensure the information is reviewed by a subject matter expert.
• Technical writer review items:
  • Ensure docs metadata is present and up-to-date.
  • Ensure the appropriate labels are added to this MR.
  • Ensure a release milestone is set.
  • If relevant to this MR, ensure content topic type principles are in use, including:
    • The headings should be something you'd do a Google search for. Instead of Default behavior, say something like Default behavior when you close an issue.
    • The headings (other than the page title) should be active. Instead of Configuring GDK, say something like Configure GDK.
    • Any task steps should be written as a numbered list.
    • If the content still needs to be edited for topic types, you can create a follow-up issue with the docs-technical-debt label.
• Review by assigned maintainer, who can always request/require the reviews above. Maintainer's review can occur before or after a technical writer review.

cc @kpaizee