v2.3.0

Moves development and documentation dependencies from optional-dependencies to
dependency groups, switches to
httpx2 for HTTP client support, and removes
the inflection dependency.

• dev and docs dependencies are now declared under [dependency-groups]
  instead of [project.optional-dependencies]. Installed via uv sync --all-groups.
• The http extra now uses httpx2 instead of httpx. httpx2 provides the
  same httpx module so no code changes are required.
  (#97)
• The inflection dependency has been removed.
  (#96)