init: Air780EPM 官方 LuatOS 项目代码基线

- 来源: 合宙 LuatOS 官方仓库 air780epm 模块完整代码
- 路径: luatos/air780epm/module/Air780EPM/demo 含官方 demo(含 mqtt/mqtts/socket/uart 等)
- 后续: 基于 demo 开发 UART<->MQTT 数据上报功能

luatos/air780epm/lua/include/bget.h

@@ -0,0 +1,17 @@
+/*
+    Interface definitions for bget.c, the memory management package.
+*/
+
+typedef long bufsize;
+void bpool(void *buffer, bufsize len);
+void *bget(bufsize size);
+void *bgetz(bufsize size);
+void *bgetr(void *buffer, bufsize newsize);
+void brel(void *buf);
+void bectl(int (*compact)(bufsize sizereq, int sequence), void *(*acquire)(bufsize size), void (*release)(void *buf), bufsize pool_incr);
+void bstats(bufsize *curalloc, bufsize *totfree, bufsize *maxfree, unsigned long  *nget, unsigned long *nrel);
+void bstatse(bufsize *pool_incr, long *npool, unsigned long *npget, unsigned long *nprel, unsigned long *ndget, unsigned long *ndrel);
+void bufdump(void *buf);
+void bpoold(void *pool, int dumpalloc, int dumpfree);
+int bpoolv(void *pool);
+bufsize bstatsmaxget(void);