fix(cat-voices): flutter_inappwebview's web_support.js not found error

[digitalheartxs]

Description

There was an issue with flutter_inappwebview's web_support.js not found

Description of Changes

Newer version of flutter_quill_extensions doesn't use flutter_inappwebview and we explicitly added reference to web_support.js to index.html before, so now it needed to be removed.
Also I upgraded here flutter_quill_extensions explicitly and cleaned related files.

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[github-actions]

❌ Test Report | ${\color{lightgreen}Pass: 265/270}$ | ${\color{red}Fail: 5/270}$ |

[dtscalac]

LGTM