fix: jwt request sig format

[EthanYuan]

This pull request includes several changes to the mutiny-core and mutiny-wasm packages, focusing on improving the signature serialization method and adding new tests.

fix signature serialization:

• mutiny-core/src/authclient.rs: Changed the signature serialization method from serialize_compact to serialize_der to ensure DER encoding is used.

Version update:

• mutiny-wasm/Cargo.toml: Incremented the package version from 1.10.23 to 1.10.24 to reflect the changes.

Test enhancements:

• mutiny-core/src/authclient.rs: Added a new asynchronous test test_auth_manager_sign to verify the signature and public key generation process using the updated DER serialization method.