[node-build-scripts] chore: use non-deprecated syntax to import 'sass'

[adidahiya]

Changes proposed in this pull request:

Migrate import sass from "sass" imports to use the import * as sass syntax to avoid some deprecation warnings that are now being produced by the latest version of dart-sass.

Reviewers should focus on:

N/A - if it builds successfully, it's good to go

[adidahiya]

[node-build-scripts] chore: use non-deprecated syntax to import 'sass'

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

[adidahiya]

Before (link to CI job):

$ sass-compile ./src
$ tsc -p ./src -m commonjs --outDir lib/cjs
`import sass from 'sass'` is deprecated.
Please use `import * as sass from 'sass'` instead.
[sass-compile] Finished compiling all input .scss files

After (link to CI job):

$ sass-compile ./src
$ tsc -p ./src -m commonjs --outDir lib/cjs
$ tsc -p ./src -t esnext --outDir lib/esnext
[sass-compile] Finished compiling all input .scss files.