ZIP-0: renames the pypi project package name to ziptax-sdk

[ericlakich]

This pull request updates the project to use the new name ziptax-sdk instead of ziptax throughout the codebase, documentation, and configuration files. It also standardizes the casing of "Ziptax" and updates related metadata and usage instructions to reflect these changes.

Project/package renaming and metadata updates:

• Changed the project/package name from ziptax to ziptax-sdk in pyproject.toml, README.md, and docs/spec.yaml, including updating the version and description to reference "Ziptax SDK" and the correct team name. [1] [2] [3] [4]
• Updated the PyPI URLs and badges in the workflow and documentation to point to ziptax-sdk instead of ziptax. (.github/workflows/publish.yml, README.md) [1] [2]

Documentation and usage improvements:

• Updated all code examples and usage references in README.md to use ZiptaxClient (with the new casing and name) instead of ZipTaxClient, and changed import/install instructions to use ziptax-sdk. [1] [2] [3]
• Standardized the spelling and casing of "Ziptax" throughout the documentation and metadata, including exception messages, team references, and API names. [1] [2] [3] [4] [5]

These changes ensure consistency across the project and prepare the package for publishing under the new name.

[Copilot]

Pull request overview

This PR renames the PyPI package from ziptax to ziptax-sdk and standardizes the branding to use "Ziptax" consistently throughout the codebase. The package version is also updated to 0.1.0-beta to reflect the new release under the new name.

Changes:

• Package name changed from ziptax to ziptax-sdk in project configuration and documentation
• Class name updated from ZipTaxClient to ZiptaxClient for consistent branding
• Brand name standardized from "ZipTax" to "Ziptax" across all documentation and metadata

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
pyproject.toml	Updated package name to ziptax-sdk, version to 0.1.0-beta, and standardized team name to "Ziptax Team"
docs/spec.yaml	Updated project name, description, and API name references to use "Ziptax" consistently
README.md	Updated installation instructions, code examples with new client name, and branding references
.github/workflows/publish.yml	Updated PyPI URL to point to the new package name

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