fix(layout): grid triage and regression (#1440)

* fix(table of contents): multiple scrollbars (https://github.com/jackyzha0/quartz/issues/1388)

* fix(center): Main content mininum width (https://github.com/jackyzha0/quartz/issues/1439)

* fix(code block): Horizontal overflow fix (https://github.com/jackyzha0/quartz/issues/1438, https://github.com/jackyzha0/quartz/issues/1353)

* WIP fix for ul/ol .overflow

* Fix: restore former scrollbar behavior for overflow lists (https://github.com/jackyzha0/quartz/issues/1437)

* Fix: code block overflow-x

* fix: Table of Content overflow (https://github.com/jackyzha0/quartz/issues/1437)

* Address feedback

* Move max-height toggle from js to css