Out of ordered lists, only non-empty starting with 1 can interrupt paragraphs

[lostenderman]

See https://spec.commonmark.org/0.30/#example-305 Follows #70

[Witiko]

The corresponding unit test is testfiles/CommonMark_0.30/lists/005.test:

%   ---RESULT--- "example": 305,
%   
%   <p>The number of windows in my house is</p>
%   <ol>
%   <li>The number of doors is 6.</li>
%   </ol>
%   
%   ---\RESULT---

<<<
The number of windows in my house is
1.  The number of doors is 6.
>>>
documentBegin
interblockSeparator
olBeginTight
olItemWithNumber: 1
olItemEnd
olEndTight
documentEnd

Here is the result of running git checkout commonmark; cd tests; ./test.sh "testfiles/CommonMark_0.30/lists/005.test":

Testfile testfiles/CommonMark_0.30/lists/005.test
  Format templates/plain/
    Template templates/plain/input.tex.m4
      Command pdftex   --shell-escape                  --interaction=nonstopmode  test.tex
*** test-expected.log   2022-12-22 11:48:55.739015156 +0100
--- test-actual.log 2022-12-22 11:49:02.378957086 +0100
***************
*** 1,7 ****
  documentBegin
- interblockSeparator
- olBeginTight
- olItemWithNumber: 1
- olItemEnd
- olEndTight
  documentEnd
--- 1,2 ----

The issue seems related to the PEG patterns for parsing lists (1, 2), which use the rules for Gruber's Markdown, rather than CommonMark.

Similarly to options blankBeforeBlockquote, blankBeforeCodeFence, blankBeforeDivFence, and blankBeforeHeading, we should add option blankBeforeList with default value of false, which would control this behavior. See also https://github.com/Witiko/markdown/issues/29.