Document existing CLI selection strategy feature

[Copilot]

Summary

This PR documents and verifies that the CLI selection strategy feature requested in the issue is already fully implemented and working. No code changes were required.

Issue Analysis

The issue requested allowing users to choose a selection strategy on the CLI with 3 strategies available:

• cheapest
• cheapest foil
• Blingiest (aka most expensive foil option)

Current Implementation

All three requested strategies are already available via the --strategy CLI flag:

# Use cheapest strategy (default)
python -m mtg_deal_finder cards.txt --strategy cheapest

# Use cheapest foil strategy
python -m mtg_deal_finder cards.txt --strategy cheapest-foil

# Use blingiest strategy (most expensive foil)
python -m mtg_deal_finder cards.txt --strategy blingiest

Verification

Created and ran unit tests to verify each strategy works correctly:

Testing Strategy Selection
============================================================

1. Testing 'cheapest' strategy: ✓ PASSED
   Selected: $0.75 - Non-foil

2. Testing 'cheapest-foil' strategy: ✓ PASSED
   Selected: $2.00 - Foil

3. Testing 'blingiest' strategy: ✓ PASSED
   Selected: $5.00 - Most expensive foil

============================================================
All strategy tests PASSED! ✓

Additional Features

The implementation includes two bonus strategies beyond what was requested:

• cheapest-nonfoil - For non-foil versions only
• best-condition - For the cheapest Near Mint cards

These provide additional value without interfering with the core requested functionality.

Conclusion

The feature is complete and functional. Users can already choose between the three requested selection strategies via the CLI. The issue appears to have been created before this implementation was done, or it was documenting a feature that has since been completed.

Closes #[issue_number]

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Allow use to choose selection strategy</issue_title>
<issue_description>Allow use to choose selection strategy on the CLI

3 strategies available:

• cheapest
• cheapest foil
• Blingiest (aka most expensive foil option)</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #10

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