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

codecov.yml

@@ -4,8 +4,11 @@ coverage:
         project:
             default:
                 target: 50% # the required coverage value
-                threshold: 1% # the leniency in hitting the target
-
+                threshold: 5% # the leniency in hitting the target
+        patch:
+            default:
+            target: 50%
+            threshold: 5%
     ignore:
         - tests/