Add Unit Tests for Context Class in Pieces OS Client

[sambhavnoobcoder]

Description:

This PR introduces a comprehensive set of unit tests for the Context class in the Pieces OS Client. This PR solves the issue #55 .

Tests :

The tests cover the following methods:

• test_init: Verifies the initialization of the Context object.
• test_clear: Checks the clearing of assets and messages within the context.
• test_get_relevant_dict: Tests the retrieval of relevant dictionary data based on the context.
• test_check_relevant_existence: Validates the existence of relevant paths.
• test_check_messages: Confirms that messages are being properly handled and flattened.
• test_check_assets: Ensures that assets are correctly processed and flattened.
• test_check_paths: Verifies the validity of paths used within the context.
• test_check_raw_assets: Tests the handling of raw assets and their conversion into Seeds.
• test_relevance_api: Mocks and tests the relevance_api method for relevance checks.

Screenshots :

Here is a screenshot of all test cases passing :

[Bishoy-at-pieces]

LGTM