feat: support noqa before multiline strings

[tacerus]

Allow rules applying to lines inside multiline strings inside lists to be skipped by using the "noqa" statement in the line of the multiline start marker.

[tacerus]

See #317.

[roaldnefs]

As-written the patch silently breaks all existing noqa usage. Easy fixes; should not be marked ready until both bugs are fixed and a TestSkipRule case mirroring issue #317 is added.

Two blocking bugs:

1. Operator precedence — > in any line propagates skips: if last['line'].startswith('-') and '|' in last['line'] or '>' in last['line'] parses as (startswith AND '|') OR '>'. So a Jinja line like {{ x > 5 }} after a list-item-with-noqa inherits the skip. Fix by parenthesizing the or.
2. Current-line noqa is now ignored: skips is built only from last['skips']; the final check if self.id in skips no longer consults rule_id_list. Every existing key: value # noqa: 204 on a non-multiline line stops working. Fix by building a combined list that includes rule_id_list.

Other notes:

• No tests. tests/unit/TestSkipRule.py is the obvious place; tests would have caught both bugs immediately.
• not previous_skip in rule_id_list → previous_skip not in rule_id_list (pylint C0117).
• Stray blank line at L84
• No CHANGELOG.md entry