frost: initialize project

This commit adds the foundational configuration and building scripts
and an initial structure for the project.

src/modules/frost/Makefile.am.include

@@ -0,0 +1,2 @@
+include_HEADERS += include/secp256k1_frost.h
+noinst_HEADERS += src/modules/frost/main_impl.h

src/modules/frost/main_impl.h

@@ -0,0 +1,10 @@
+/**********************************************************************
+ * Copyright (c) 2021-2024 Jesse Posner                               *
+ * Distributed under the MIT software license, see the accompanying   *
+ * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
+ **********************************************************************/
+
+#ifndef SECP256K1_MODULE_FROST_MAIN
+#define SECP256K1_MODULE_FROST_MAIN
+
+#endif

src/secp256k1.c

@@ -908,3 +908,7 @@ static int secp256k1_ge_parse_ext(secp256k1_ge* ge, const unsigned char *in33) {
 #ifdef ENABLE_MODULE_SURJECTIONPROOF
 # include "modules/surjection/main_impl.h"
 #endif
+
+#ifdef ENABLE_MODULE_FROST
+# include "modules/frost/main_impl.h"
+#endif