Checkpoint the party/runtime stack before share-program and malicious-mode work.

Ship the TLS mesh, composer, Beaver/Yao/leaf MPC, prep/online paths, apps, and docs so the tree is pushable before elevating share_expr, security_mode, and prep resume.

Co-authored-by: Cursor <cursoragent@cursor.com>

party/p1.cpp

@@ -0,0 +1,6 @@
+#include "cases.hpp"
+
+int main(int argc, char ** argv)
+{
+    return dpf::party::run(dpf::net::role::p1, argc, argv);
+}