feat: implement custom comment syntax

renderer/__main__.py

@@ -0,0 +1,8 @@
+import sys
+
+import mistletoe
+from fifty_ohm_html_renderer import FiftyOhmHtmlRenderer
+
+if __name__ == "__main__":
+    with open(sys.argv[1]) as fin, open(sys.argv[2], "w") as fout:
+        fout.write(mistletoe.markdown(fin, FiftyOhmHtmlRenderer))

renderer/fifty_ohm_html_renderer.py

@@ -0,0 +1,21 @@
+from mistletoe import HtmlRenderer
+from mistletoe.block_token import BlockToken
+
+
+class FiftyOhmHtmlRenderer(HtmlRenderer):
+    def __init__(self):
+        super().__init__(Comment)
+
+    def render_comment():
+        return None
+
+
+class Comment(BlockToken):
+    @staticmethod
+    def start(line):
+        return line.startswith("%")
+
+    @classmethod
+    def read(cls, lines):
+        next(lines)
+        return None