post vitepress tasks

[pirog]

to whomever gets to this, there are still a few things we need to do here:

• go through the guides/troubleshooting docs and move any that would be better served in a plugins docs eg the "lando and phpstorm" guide might be better in https://docs.lando.dev/plugins/php/guides.html
• if a user adds a plugin but doesnt have an external page to link to the docs it will serve the markdown file and we need to style https://github.com/lando/docs/blob/main/.vitepress/theme/VPLPluginLayout.vue for that purpose, you can try this with an existing plugin.md by commenting out link from the frontmatter