refactor(projects): build the projects list on the octokit SDK

Replace hand-rolled REST paging, GraphQL cursor loops and header plumbing with
octokit, which also brings request retry and rate-limit backoff. Introduces the
repo's first package.json, lockfile and ESLint flat config; the Hugo site build
itself still needs no Node step.

Output verified against the previous implementation: identical counts and rows
apart from live star drift on four upstream repos.

.gitignore

@@ -35,3 +35,6 @@ resources
 
 assets/jsconfig.json
 .DS_Store
+
+# Node dependencies
+node_modules