fix(flutter/catalyst_compression): catalyst compression doesn't load in dev

[dtscalac]

Description

Catalyst compression doesn't load in dev due to wrong CORS/CORP headers that are set by 3rd party server serving dependent assets.

We copy these assets from 3rd party server into our own package so that our own server will serve them with correct headers.

Additionally a workaround (enable-threads.js) has been removed from catalyst_cardano_example, we can provide custom headers when running the app instead of using the workaround.

Screenshots

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 | ${\color{lightgreen}Pass: 327/327}$ | ${\color{red}Fail: 0/327}$ |

[github-actions]

✅ Test Report | ${\color{lightgreen}Pass: 327/327}$ | ${\color{red}Fail: 0/327}$ |