Some wamr-ide improvements (#1354)

including:
- enable macOS support
- documentation improvements
- fix some warnings

test-tools/wamr-ide/VSCode-Extension/resource/scripts/build.bat

@@ -4,12 +4,8 @@
 @echo off
 
 @REM start a container, mount current project path to container/mnt
-docker run --name=wasm-toolchain-ctr ^
+docker run --rm --name=wasm-toolchain-ctr ^
                 -it -v "%cd%":/mnt ^
                 --env=PROJ_PATH="%cd%" ^
                 wasm-toolchain:1.0  ^
                 /bin/bash -c "./build_wasm.sh %1"
-
-@REM stop and remove wasm-toolchain-ctr container
-docker stop wasm-toolchain-ctr>nul 2>nul
-docker rm wasm-toolchain-ctr>nul 2>nul