Add JSON source

[AndreuCodina]

No description provided.

[coveralls]

coverage: 99.35% (+0.04%) from 99.308%
when pulling ea9ee7c on feature/add-json-source
into 9986e23 on main.

[Copilot]

Pull request overview

This PR adds JSON file support as a configuration source, complementing the existing environment variable source. When a ServiceCollection is used, appsettings.json and appsettings.{environment}.json are now automatically loaded before environment variables, giving environment variables highest priority. It also adds a content_root_path parameter to ConfigurationManager to resolve relative JSON file paths.

Changes:

• New JsonConfigurationProvider and JsonConfigurationSource that load key/value pairs from a JSON file, with optional/required file semantics.
• ConfigurationManager gains a required content_root_path constructor parameter and a new add_json_file method; ServiceCollection._create_configuration() automatically registers appsettings.json and appsettings.{environment}.json.
• Updated documentation and tests to reflect the new JSON source and the new ConfigurationManager constructor signature.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/wirio/configuration/json/json_configuration_provider.py	New provider that reads and normalizes key/value pairs from a JSON file
src/wirio/configuration/json/json_configuration_source.py	New source that builds a JsonConfigurationProvider
src/wirio/configuration/json/__init__.py	New package marker for the JSON configuration module
src/wirio/configuration/configuration_manager.py	Adds content_root_path to constructor and add_json_file public method
src/wirio/service_collection.py	Auto-registers JSON file sources and passes content_root_path to ConfigurationManager
tests/configuration/test_json_configuration_provider.py	New tests for JsonConfigurationProvider
tests/configuration/test_configuration_manager.py	Updates existing tests to pass new required content_root_path="" argument
docs/pages/core-concepts/configuration.md	Documents JSON file sources and the default precedence order

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