Some wamr-ide improvements (#1354)

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

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

@@ -1,13 +1,10 @@
+#!/bin/bash
+
 # Copyright (C) 2019 Intel Corporation.  All rights reserved.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-#!/bin/bash
-
-docker run --name=wasm-toolchain-ctr \
+docker run --rm --name=wasm-toolchain-ctr \
                 -it -v "$(pwd)":/mnt \
                 --env=PROJ_PATH="$(pwd)" \
                 wasm-toolchain:1.0  \
                 /bin/bash -c "./build_wasm.sh $1"
-
-docker stop wasm-toolchain-ctr>/dev/null
-docker rm wasm-toolchain-ctr>/dev/null