lit: add page

[P2Tree]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The page(s) follow the style guide.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known): LLVM 19

[tldr-bot]

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

pages/common/lit.md:
Error: Parse error on line 5:
...mmandGuide/lit.html>- Run a specified 
-----------------------^
Expecting 'END_INFORMATION_LINK_URL', got 'NEWLINE'
pages/common/lit.md:5: TLDR011 Page never contains more than a single empty line

Please fix the error(s) and push again.

[spageektti]

Hi. Thanks for your contribution!

[gutjuri]

LGTM after the suggestions