chore(readme): organize project

[tchapacan]

This PR is open to organize project :

TODO

for information purpose and as note for later (not to forget lol)

• organize repo
• add more tests (globally)
• update hyper dependancies/syntax
• better error handling
• embedded/update exporter_base_prometheus crate ?
• seek other metrics to display
• add github workflow for CI
• add github workflow for CD
• add sample grafana dashboard
• etc..
  ..

Can (should) be split in multiple PR, will create associated issue as well later