add afl fuzz target

tests/afl/in/all.dj

@@ -0,0 +1,35 @@
+{.class}
+{#id}
+{attr=value}
+# heading
+
+## sub heading
+
+para
+
+::: div-class
+
+- list item
+
+    - indented list item
+
+```lang
+code block
+```
+
+:::
+
+> blockquote
+> > inner
+> > inner
+> outer
+
+[tag]: url
+[^footnote]: description
+
+inline `verbatim` _emphasis_, *strong*, ^sup^, ~sub~, {-del-}, {+ins+} \
+[link][], [text][tag], [text](url), ![alt text](src), <https://example.com>,
+<mail@example.com>, {=mark=}, 'single', "double", $`inline`, $$`display`
+{%comment%}, [span of text]{with=some .attributes}, $`<em>raw html</em>`{=html}
+
+- * - * - * -