update some doc

scripts/install_rust.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+echo 'install rust'
+sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly -y
+echo 'export PATH="$$HOME/.cargo/bin:$$PATH"' >> ~/.bash_profile
+source ~/.bash_profile

scripts/install_tool.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+#targets
+rustup target add x86_64-apple-darwin
+
+#tools
+echo 'install tools'
+rustup component add rustfmt
+cargo install cargo-expand
+cargo install cargo-watch
+cargo install cargo-cache
+
+#protobuf code gen env
+brew install protobuf@3.13
+cargo install --version 2.20.0 protobuf-codegen