feat(asset-index): move redemption fee to storage

[clearloop]

Changes

• [x] add default redemption fee
• [x] create storage for redemption fee
• [x] add ex for setting redemption fee
• [x] update benchmarks
• [x] update tests
• [x] update javascript types

Tests

CI

Issues

• Closes #441

[clearloop]

finally realized that the issue blocingk me in #328 is caused by this redemption fee..