feat(devtools): allow underscore in skill filenames

apps/tools/librelingo_tools/lili.py

@@ -69,10 +69,15 @@ def guess_path_to_course(path_to_course):
     return path_to_course
 
 
-def skillfile_filter(path):
-    match = re.search(r"^([a-z0-9]+)/skills/([a-z0-9_-]+)\.yaml$", path)
+def parse_skill_path(path):
+    match = re.search(r"^([a-zA-Z0-9-]+)/skills/([a-zA-Z0-9_-]+)\.yaml$", path)
     if not match:
         raise Exception(f"unrecoginized skill path: '{path}'")
+    return match
+
+
+def skillfile_filter(path):
+    match = parse_skill_path(path)
     # return match.group(1) + '/' + match.group(2)
     return match.group(2)
 
@@ -147,9 +152,7 @@ def export_skill_html_pages(course, count, reldir, html_dir):
                 skill=skill,
                 repository_url=get_repository_url(course),
             )
-            match = re.search(r"^([a-z0-9]+)/skills/([a-z0-9_-]+).yaml", skill.filename)
-            if match is None:
-                exit(skill.filename)
+            match = parse_skill_path(skill.filename)
             module_name = match.group(1)
             file_name = match.group(2)
             dir_path = os.path.join(html_dir, "course", module_name, "skills")