chore: generate more efficient assets

[P0lip]

Checklist

• Tests added / updated
• Docs added / updated

Does this PR introduce a breaking change?

• Yes
• No

Additional Context

Compression does its job when it comes to file size, yet it obviously doesn't solve the issue with unnecessary high memory consumption in Studio.

The gain in size comes from the $ref resolver change as well as using import type that makes sure we do not import any code.

Before:

ls -lh rulesets/assets
total 1,6M
-rw-rw-r-- 1 p0lip p0lip 1,6M maj 31 22:25 assets.json

Before (gzipped):

 ls -lh rulesets/assets
total 44K
-rw-rw-r-- 1 p0lip p0lip 43K maj 31 22:25 assets.json.gz

After:

ls -lh rulesets/assets
total 324K
-rw-rw-r-- 1 p0lip p0lip  63K maj 31 22:13 assets.asyncapi.json
-rw-rw-r-- 1 p0lip p0lip 159K maj 31 22:13 assets.json
-rw-rw-r-- 1 p0lip p0lip  97K maj 31 22:13 assets.oas.json

After (gzipped):

ls -lh rulesets/assets
total 48K
-rw-rw-r-- 1 p0lip p0lip 7,5K maj 31 22:27 assets.asyncapi.json.gz
-rw-rw-r-- 1 p0lip p0lip  21K maj 31 22:27 assets.json.gz
-rw-rw-r-- 1 p0lip p0lip  14K maj 31 22:27 assets.oas.json.gz

Tested in Studio & it works.

[P0lip]

Addresses the following warning.

[nulltoken]

Wow. Just tested it locally. That's just... impressive!

🚀