docs: populate cometbls.md (#85)

* docs: populate cometbls.md

* docs: update nodeDepsHash

* docs: remove link to validators

* ci: add words to dictionary

* docs: fix npmDepsHash

* ci: fix preview message

* ci: update nix version for previews

* docs: regenerate lockfile

* docs: add stuff on CometBLS

* docs(cometbls): elaborate on zkp generation