added C4Container, C4Component, C4Dynamic, and C4Deployment as detected diagram types

[mwatidy]

Hey 👋 thanks for all your contributions so far. As we are using this plugin in our work we needed to detect some additional mermaid diagrams. So I created this MR to add additional keywords that should trigger isMermaidCode as to their documentation provided here.

https://mermaid.js.org/syntax/c4c.html#c4-container-diagram-c4container

thanks again and have a good one 😉

[johanneswuerbach]

Released as backstage-plugin-techdocs-addon-mermaid@0.8.0, thank you for your contribution 🙇 .