Refactor handling in HacsRepository to use the new API client

[ludeeus]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the GitHub API integration by replacing the legacy AIOGitHubAPINotModifiedException exception with the newer GitHubNotModifiedException, and modernizes the async_get_legacy_repository_object method to use the new githubapi interface instead of the deprecated get_repo method.

Key changes:

• Updated exception handling to use GitHubNotModifiedException instead of AIOGitHubAPINotModifiedException
• Refactored async_get_legacy_repository_object to use the new self.hacs.githubapi.repos.get() API
• Simplified exception handling by removing redundant exception types from the catch block

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[frenck]

@copilot resolved the merge conflict

[Copilot]

@copilot resolved the merge conflict

Done — merged main into the branch. The only conflict was in the aiogithubapi import block in base.py. Resolved by keeping GitHubNotModifiedException (from this PR) alongside GitHubException (added by main's tree-retrieval refactor), and dropping AIOGitHubAPINotModifiedException and the runtime GitHubReleaseModel import (which main moved into TYPE_CHECKING).