metrics page + upgrade to vue 3

What's Changed

• deps: frontend Vue 3 Upgrade by @sgfost in #652
• feat: updated comses digest archive logic by @sgfost in #630
• feat: new metrics dashboard at /about/metrics by @comses/comses-student-devs @sgfost @alee
• docs: add student devs as contributors

Full Changelog: v2023.03...v2023.07