git-describe: add page

[antoine-amara]

Description

add a page for git describe command.
git describe is a command from the git scm software.

Linked Issues:

• Let's document git

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

[tldr-bot]

The build for this PR failed with the following error(s):

pages/common/git-describe.md:24 MD004/ul-style Unordered list style [Expected: dash; Actual: asterisk]
pages/common/git-describe.md:4: TLDR004 Command descriptions should end in a period
pages/common/git-describe.md:5: TLDR011 Page never contains more than a single empty line
pages/common/git-describe.md:20: TLDR005 Example descriptions should end in a colon
pages/common/git-describe.md:24: TLDR102 Example description probably not properly annotated

Please fix the error(s) and push again.

[sbrl]

Thanks for the new page, @antoine-amara! I've left some comments below for you to review.

[antoine-amara]

Thanks for the review @sbrl , I push the changes.

[sbrl]

Thanks, @antoine-amara!

Next time, perhaps you could avoid force-pushing please? It makes it harder to tell what's changed when reviewing, and we've got a special button that allows us to squash easily on merge 😺