add flatbuffers

flatbuffers/README.md

@@ -0,0 +1,35 @@
+
+
+# Install `flatc`
+
+## Install `cmake`
+
+https://cmake.org/install/
+
+## Get `flatbuffers`
+
+```shell
+% git clone https://github.com/google/flatbuffers.git
+```
+
+## Make
+
+```shell
+% cmake -G "Unix Makefiles"
+% make
+% make install
+```
+
+```shell
+% flatc --version
+```
+
+# Compile `fbs`
+
+```shell
+% flatc --rust file.fbs
+```
+
+
+
+