docs: fix inaccuracies in README code examples

[jonathannorris]

Summary

• Fix multiple code examples in the README that would fail at import or runtime if copy-pasted

Changes

1. Targeting: Removed non-existent get_provider from openfeature.api imports; added missing EvaluationContext import from openfeature.evaluation_context
2. Targeting: Fixed get_client(name="No-op Provider") to get_client(domain="No-op Provider") (actual parameter is domain)
3. Hooks: Replaced client = OpenFeatureClient() (fails with TypeError due to required domain and version args) with api.get_client()
4. Hooks: Fixed client.get_boolean_flag(...) to client.get_boolean_value(...) (actual method name)
5. Eventing: Changed ProviderEvent import to canonical openfeature.event; added missing EventDetails import
6. Hook example: Fixed hints: dict to hints: HookHints (actual type annotation); added missing HookContext, HookHints, and FlagEvaluationDetails imports

All fixed examples were verified to import and execute successfully against the current main branch.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.33%. Comparing base (7d9229f) to head (02cd52c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #592 +/- ##
=======================================
Coverage 98.33% 98.33% =======================================
Files 45 45 Lines 2157 2157 =======================================
Hits 2121 2121 Misses 36 36 

Flag	Coverage Δ
unittests	98.33% <ø> (ø)

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[gemini-code-assist]

Code Review

This pull request updates the README documentation to align with recent SDK changes, including the transition from name-based to domain-based client initialization, method renames, and more precise type annotations for provider and hook implementations. The review feedback suggests further refining the hook example by importing FlagValueType and using it as a generic argument for FlagEvaluationDetails to ensure the documentation accurately reflects the SDK's actual method signatures.

[Copilot]

Pull request overview

Updates the README’s Python snippets to align with the actual openfeature Python SDK API, so examples can be copy‑pasted without import/runtime failures.

Changes:

• Fixes invalid/obsolete imports in the Targeting and Eventing examples (get_provider removal, EvaluationContext, EventDetails/ProviderEvent canonical module).
• Corrects client acquisition and flag evaluation API usage in the Hooks example (api.get_client(), get_boolean_value).
• Aligns hook type annotations with the SDK’s hook interface (HookHints, HookContext, FlagEvaluationDetails[FlagValueType]).

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