test(cli): regression coverage for JSON export CI progress gating

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Description

Adds focused unit tests for _supports_live_progress in resource_json.py so installation/directory JSON export always uses logger-based percentage updates when CI or GITHUB_ACTIONS is set, even if stderr still reports as a TTY. This matches the fix in c7e573d1d and protects caplog-based tests and CI log aggregators from silent regressions.

Type of Change

• ✅ Test addition or update

Package(s) Affected

• PyKotor (core library)

Changes Made

• New file Libraries/PyKotor/tests/cli/test_resource_json_progress.py with six tests covering: CI / GITHUB_ACTIONS truthy variants, TTY streams, non-TTY streams, and streams without isatty.

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Test Results

uv run --directory Libraries/PyKotor python -m pytest --import-mode=importlib -m "not gui and not slow" --timeout=120 Libraries/PyKotor/tests/cli/test_resource_json_progress.py -q
# 6 passed

Risky behavior now covered

• JSON export progress in CI: Without these checks, _ExportProgressReporter could use carriage-return live updates on stderr; percentage milestones would bypass logger.info, breaking assertions that rely on captured logs (e.g. test_export_installation_to_json_tree_logs_percentage_progress) and hiding export progress from centralized CI logs.

Test files added/updated

• Added: Libraries/PyKotor/tests/cli/test_resource_json_progress.py

Why this reduces regression risk

The behavior is environment-sensitive (TTY vs CI). Direct unit tests pin the contract: whenever automation sets CI or GITHUB_ACTIONS, live TTY progress must be disabled regardless of isatty(), while normal TTY sessions still get live updates when those variables are unset.

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• My changes generate no new warnings (for the added file; read_lints clean)

Related Issues

Related to automated regression-test coverage for recently merged JSON export behavior.

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