VSCode IDE enhancement and readme update (#3172)

- Temporarily disable the deque test for the VS Code extension, as the
  Rust formatter seems to malfunction after a recent VS Code update.
- Add configuration for iwasm host managed heap size, allowing users
  to flexibly `malloc` memory. This also fixes the current bug that when
  default size is 0, it can't run and debug.
- Apply coding style formatting for WAMR IDE source code and add a
  format check for it in CI.
- Update document and some screenshots.

.github/workflows/compilation_on_android_ubuntu.yml

@@ -650,6 +650,12 @@ jobs:
           npm install
         working-directory: test-tools/wamr-ide/VSCode-Extension
 
+      - name: code style check
+        run: |
+          npm install --save-dev prettier
+          npm run prettier-format-check
+        working-directory: test-tools/wamr-ide/VSCode-Extension
+
       - name: build iwasm with source debugging feature
         run: |
           mkdir build