* docs: fix A-Z built-in tools nav, split plugin page, consolidate sandbox docs * docs: add dedicated OpenShell sandbox backend page * style: format markdown tables * docs: trim plugin page, restructure available plugins into table + categories
* docs: fix A-Z built-in tools nav, split plugin page, consolidate sandbox docs * docs: add dedicated OpenShell sandbox backend page * style: format markdown tables * docs: trim plugin page, restructure available plugins into table + categories