initial commit

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

core/text.py

@@ -0,0 +1,10 @@
+def split(t,n=1990):
+    out=[];op=False
+    while t:
+        pre="```\n" if op else "";room=n-len(pre)-4
+        if len(t)<=room:out.append(pre+t);break
+        cut=t.rfind("\n",0,room);cut=cut if cut>room//2 else room
+        chunk=t[:cut];t=t[cut:].lstrip("\n")
+        o=op^(chunk.count("```")%2==1)
+        out.append(pre+chunk+("\n```" if o else ""));op=o
+    return out or [""]