Feat: Go improvements

[Meldiron]

What does this PR do?

• [x] Renames client namespace to appwrite: https://github.com/appwrite/sdk-generator/commit/a00f7275831ab33713a8cb357dff8de8857289fc https://github.com/appwrite/sdk-generator/pull/916/commits/af34bd3f6840cab3d9a9da11267a7eb8ed7dd20b

• [x] withX() constructor options instead of setX() afterwards: https://github.com/appwrite/sdk-generator/pull/916/commits/2bd4427effdf25904025f3f6ec58a6136e671181

• [x] Alias service constructors in Appwrite https://github.com/appwrite/sdk-generator/commit/db8667cce1edf7ba8368b7d39a41f150978d0d60

• [x] Fix fallback type: https://github.com/appwrite/sdk-generator/commit/22e0ba3357742e1ba7ca65eea7dabac13b919ae0 https://github.com/appwrite/sdk-generator/commit/4ab36926933d6e8e9a01b12d58b51794d8420aed

• [x] Constructor setters under struct of service: https://github.com/appwrite/sdk-generator/commit/6b02e956b3e67872d4523e2fc1ab5d7ff1c3b547

• [x] Fix README example: https://github.com/appwrite/sdk-generator/commit/169af2bc3d73c638feeb2af124e4ae90adcb83a4

Test Plan

Screenshots above - Manual QA

Related PRs and Issues

x

Have you read the Contributing Guidelines on issues?

Yes