feat: add progress bar for long-running CLI operations

[geetanunakani]

Summary

Related Issue

Fixes #ISSUE_NUMBER

Type of Change

• Bug fix
• New feature
• Documentation
• Refactoring
• Test changes
• CI/Chore

Testing

• uv run ruff check passes
• uv run mypy passes
• uv run pytest passes
• Manual testing done

Description

Closes #32

Changes Made

• Added reusable progress_bar utility in src/oss_dev/cli/progress.py
• Integrated progress bar into discover repos, discover issues, and analyze commands
• Also added to doctor command
• Shows spinner, elapsed time, and current operation description using Rich library

Skills Used

• Python, Rich library, CLI/UX design

[Hell1213]

Review: progress bar for CLI operations

Hi @geetanunakani, the progress bar utility is clean and reusable. Tests pass (72/72), ruff checks clean.

Conflict notice: PR #52 by @Jiya3177 also modifies src/oss_dev/cli/app.py (adds --json flag with early returns on the same functions). Both change the bodies of discover_repos, discover_issues, issues_list, analyze, and doctor. The merged result should wrap real work in both the progress bar AND support --json output. Consider coordinating the merge order.

Note: The time.sleep(2) placeholders are fine for stubs. When real implementations land, they should replace the sleep calls.

[Hell1213]

Progress bar utility is clean and reusable. The context manager pattern works well for this.