finch: add page

[qhyun2]

• 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).

It is time to finally close #1162

[tldr-bot]

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

Error: Parse error on line 12:
...- Quit:`alt + q``or `ctrl + c`- Sho
--------------------^
Expecting 'NEWLINE', 'TEXT', 'DASH', 'BACKTICK', got 'COMMAND_TEXT'
pages/linux/finch.md:11: TLDR014 Page should contain no trailing whitespace

Please fix the error(s) and push again.

[einverne]

Looks good, thanks @qhyun2 .

[sbrl]

Thanks so much for this, @qhyun2! It would be great to get that issue finally closed haha :D