feat: with specs dashboard

[laurentsenta]

Contributes to #123

Introduce specs dashboard side.

Example in https://singulargarden.github.io/gateway-conformance/specs/
We preserve the structure passed from specs.ipfs.tech to make linking and navigation easier.

For example:
https://singulargarden.github.io/gateway-conformance/specs/http-gateways/trustless-gateway/#entity-bytes-request-query-parameter

• process the specs and render the specs/a/b/c/ pages
• render the dashboard for each specs, and the #sub-spec-by-hash
• Add https:// to the specs URL + add Specs field for multiple specs
• Create spec -> tests & tests -> spec indexes

Note:

Tests are trees: TestDagSomething/GET_Something/StatusCode
And specs are also trees: http-gateways/trustless-gateway/#entity-bytes-request-query-parameter
What do you render for the spec http-gateways/trustless-gateway, especially if no tests are linking to that specific node in the tree?
The current PR renders all of its children, we'll have to refine this in further PRs.

[github-actions]

Results against Kubo latest:
(check the action's summary for the full results)

Summary

Tests	Failures	Errors	Skipped
1853	11	0	0

[github-actions]

Results against Kubo master:
(check the action's summary for the full results)

Summary

Tests	Failures	Errors	Skipped
1853	0	0	0