Implement analytic open-source tool with bootiks

[Tirodem]

• https://plausible.io/self-hosted-web-analytics
• https://plausible.io/docs
• https://github.com/plausible/analytics

=> install on dev-bootik instance + link to bootik for bench

Edit :

• plausible deployed on https://plausible.dev-bootik.pvh-labs.ch/
• ask Tirodem or Coyote for credentials

[coyotte508]

Note: make it optional with an env var (like LN, Bitcoin, ...) and edit the README.md with instructions

Self-hosting install: https://plausible.io/docs/self-hosting