feat: create requirements-txt linter

[justinchuby]

Example output:

>>> Lint for requirements-test.txt:

  Warning (REQUIREMENTS-TXT) format
    Run `lintrunner -a` to apply this patch.

    You can run `lintrunner -a` to apply this patch.

    1  1 | # Test dependencies to avoid doctest import errors
    2  2 | pyupgrade==3.3.1
       3 |+refurb==1.10.0;python_version>="3.10"
    3  4 | ufmt==2.0.1
    3    |-refurb==1.10.0;python_version>="3.10"
    5  5 | ufmt==2.0.1

[github-advanced-security]

lintrunner found more than 10 potential problems in the proposed changes. Check the Files changed tab for more details.