add _extensions

_extensions/drwater/typst-quotes/typst-quotes.lua

@@ -0,0 +1,24 @@
+-- Replace Chinese corner brackets with guillemets for Typst output.
+-- The filter is run before citeproc to avoid touching bibliography
+
+--- Copyright: © 2025–Present Tom Ben
+--- License: MIT License
+
+function Str(el)
+    if not FORMAT:match('typst') then
+        return el
+    end
+
+    local replacements = {
+        ['「'] = '«',
+        ['」'] = '»',
+        ['『'] = '‹',
+        ['』'] = '›'
+    }
+
+    for original, replacement in pairs(replacements) do
+        el.text = el.text:gsub(original, replacement)
+    end
+
+    return el
+end