Use gitbook-plugin-include-codeblock

[joyeecheung]

This uses https://github.com/azu/gitbook-plugin-include-codeblock so that we can just reference snippets that will be rendered by honkit instead of creating inline copies of them in the document to reduce the risk of getting out of sync.

Compare the two versions (left is the current main, right is the PR):

[Aditi-1400]

This block is closing before the function ends, is this intentional?

[joyeecheung]

Oops, I meant to just remove the log. Fixed.

[joyeecheung]

@Aditi-1400 Thanks for catching the braces. I diffed the output again and I think it should be clean now. Rendering changes in the HTMLs summrized below:

1. 03-multi-file-package/example/node_modules/my-logger/lib/utils.js: change object literal into multiple lines so we can abbreviate the properties using doxygen markers
2. 03-multi-file-package/example/app.{mjs,cjs}: wrap the exceptions in a try-catch to demonstrate better in the docs
3. 04-cjs-esm-interop/shipping-esm-for-cjs/cycle-lazy/b.cjs: real file has fixed indentation
4. 04-cjs-esm-interop/shipping-esm-for-cjs/log-with-feature-detection.js: real file has more blank lines
5. 05-cjs-esm-migration/migrating-imports/before|after/node_modules/my-module/initialize-plugin-*.js: real file has more blank lines
6. 05-cjs-esm-migration/migrating-imports/after/node_modules/my-module/index.js: real file fixed the missing semicolon