Add nfts_by_issuer data type

[Kassaking7]

High Level Overview of Change

Title

Context of Change

Following https://ripplelabs.atlassian.net/jira/software/projects/DEFI/boards/760?assignee=712020%3Aff4deb34-7fc1-428e-a2ee-354e1ddba309&selectedIssue=DEFI-128 & https://xrpl.org/docs/references/http-websocket-apis/public-api-methods/clio-methods/nfts_by_issuer/

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (non-breaking change that only restructures code)
• [ ] Tests (You added tests for code that already exists, or your new feature included in this PR)
• [ ] Documentation Updates
• [ ] Release

Did you update CHANGELOG.md?

• [x] Yes
• [ ] No, this change does not impact library users

Test Plan

[Kassaking7]

Seems not require test cases since the lib currently doesn't support integration test for Clio

[shawnxie999]

You are missing some changes. You can take a look at how the nft_history API is done. Do global search to find NFT_HISTORY and NFTHistory, and see where you are missing in some of the places.