Organize and clean up Lua test suite

[seanward]

This PR organizes the Lua test suite for the Ferrous Lua VM implementation, focusing on features needed for Redis integration.

Changes

1. Organized Test Structure

• Created logical directory structure:
  • tests/lua/basic/ - Basic language features
  • tests/lua/tables/ - Table operations
  • tests/lua/functions/ - Function and closure tests
  • tests/lua/control/ - Control flow tests
  • tests/lua/stdlib/ - Standard library tests

2. Cleaned Up Redundant Tests

• Removed ~100 redundant and unused test files
• Consolidated tests into focused, single-purpose files
• Removed misleading tests that gave false indications of implementation state

3. Added Redis-Specific Tests

• Added test for Redis-specific Lua functionality
• Focused on features needed for Redis integration (removed tests for unused features like modules)

4. Documentation & Roadmap

• Added README files explaining the purpose of each test directory
• Created test_roadmap.md documenting implementation state and priorities
• Added file headers that clarify test purpose and current implementation status

5. Improved Test Runner

• Enhanced test_suite.sh with better output formatting
• Added section summaries and clearer status reporting
• Simplified test classification as pass/fail

This PR makes no changes to the VM implementation itself - it only organizes and cleans up the test suite to provide a clear view of the current implementation status and a roadmap for completing the Redis-focused Lua implementation.

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Created by Maestro on behalf of Sean Ward