feat: add configurable timeouts (#673)

## ℹ️ Description
- Related issues: #671, #658
- Introduces configurable timeout controls plus retry/backoff handling
for flaky DOM operations.

We often see timeouts which are note reproducible in certain
configurations. I suspect timeout issues based on a combination of
internet speed, browser, os, age of the computer and the weather.

This PR introduces a comprehensive config model to tweak timeouts.

## 📋 Changes Summary
- add TimeoutConfig to the main config/schema and expose timeouts in
README/docs
- wire WebScrapingMixin, extractor, update checker, and browser
diagnostics to honor the configurable timeouts and retries
- update translations/tests to cover the new behaviour and ensure
lint/mypy/pyright pipelines remain green

### ⚙️ Type of Change
- [ ] 🐞 Bug fix (non-breaking change which fixes an issue)
- [x] ✨ New feature (adds new functionality without breaking existing
usage)
- [ ] 💥 Breaking change (changes that might break existing user setups,
scripts, or configurations)

## ✅ Checklist
- [x] I have reviewed my changes to ensure they meet the project's
standards.
- [x] I have tested my changes and ensured that all tests pass (`pdm run
test`).
- [x] I have formatted the code (`pdm run format`).
- [x] I have verified that linting passes (`pdm run lint`).
- [x] I have updated documentation where necessary.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Centralized, configurable timeout system for web interactions,
detection flows, publishing, and pagination.
* Optional retry with exponential backoff for operations that time out.

* **Improvements**
* Replaced fixed wait times with dynamic timeouts throughout workflows.
  * More informative timeout-related messages and diagnostics.

* **Tests**
* New and expanded test coverage for timeout behavior, pagination,
diagnostics, and retry logic.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/unit/test_update_checker.py

@@ -95,6 +95,18 @@ class TestUpdateChecker:
         with patch("requests.get", return_value = MagicMock(json = lambda: {"target_commitish": "e7a3d46"})):
             assert checker._get_release_commit("latest") == "e7a3d46"
 
+    def test_request_timeout_uses_config(self, config:Config, mocker:"MockerFixture") -> None:
+        """Ensure HTTP calls honor the timeout configuration."""
+        config.timeouts.multiplier = 1.5
+        checker = UpdateChecker(config)
+        mock_response = MagicMock(json = lambda: {"target_commitish": "abc"})
+        mock_get = mocker.patch("requests.get", return_value = mock_response)
+
+        checker._get_release_commit("latest")
+
+        expected_timeout = config.timeouts.effective("update_check")
+        assert mock_get.call_args.kwargs["timeout"] == expected_timeout
+
     def test_get_commit_date(self, config:Config) -> None:
         """Test that the commit date is correctly retrieved from the GitHub API."""
         checker = UpdateChecker(config)