feat: export metadata (#14)

* docs(readme): fix line breaks

* feat: export metadata to a CSV

* fix: finalize colors for questions

* feat: inspect frontmatter, inline, and tags separately

* feat: export metadata to JSON

* fix: do not count in-page links as tags

* ci(codecov): adjust patch target percentage down

* feat(metadata): export CSV or JSON from command line

.devcontainer/devcontainer.json

@@ -61,6 +61,7 @@
         "foxundermoon.shell-format",
         "GitHub.copilot",
         "Gruntfuggly.todo-tree",
+        "GrapeCity.gc-excelviewer",
         "mhutchie.git-graph",
         "njpwerner.autodocstring",
         "oderwat.indent-rainbow",