chore: replace hatchling with uv_build as the build backend

[quettabit]

No description provided.

[greptile-apps]

Greptile Summary

Replaces hatchling with uv_build as the build backend. The explicit [tool.hatch.build.targets.wheel] stanza pointing at src/s2_sdk is removed because uv_build defaults to src/<normalized-package-name>, and s2-sdk normalizes to s2_sdk, so discovery works without any extra config.

• The version pin >=0.11.14,<0.12 matches uv's own documentation recommendation to ensure reproducible builds across uv releases.
• No other build-related configuration ([tool.uv.build-backend], module-root, etc.) is needed since this is a standard single-module src layout.

Confidence Score: 5/5

Safe to merge — the change is a straightforward build backend swap with no logic, API, or runtime behavior affected.

The only file changed is pyproject.toml. The new backend's default src-layout discovery correctly maps to the existing src/s2_sdk/ structure without any additional configuration, and the version pin follows uv's own published guidance.

No files require special attention.

Important Files Changed

Filename	Overview
pyproject.toml	Switches build backend from hatchling to uv_build; removes explicit wheel target config since uv_build discovers src/s2_sdk automatically via its default src-layout convention.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["uv build / pip wheel"] --> B["[build-system] in pyproject.toml"]
    B --> C["uv_build backend"]
    C --> D["Normalize project name\ns2-sdk → s2_sdk"]
    D --> E["Default module root: src/"]
    E --> F["Discover src/s2_sdk/__init__.py"]
    F --> G["Build wheel / sdist"]

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