Add comprehensive analysis documentation for TMap userdata round-trip support implementation

[Copilot]

This PR adds comprehensive documentation analyzing the TMap userdata round-trip support implementation that was added in commit bfa12cd. The analysis explains what the changes do and their impact on the UE4SS Lua API.

What the Original Changes Accomplished

The commit bfa12cd implemented TMap userdata round-trip support, completing container userdata support for all three major UE4 container types (TArray, TSet, and TMap). The key enhancement was adding support for passing TMap userdata objects directly as function parameters.

Core Technical Implementation

The primary change was in the push_mapproperty function's Operation::Set case, which now handles:

1. TMap userdata copying: Direct conversion from TMap userdata to native UE4 TMap structures
2. Proper memory management: Key-value pair copying with correct offset calculations and rehashing
3. Type safety: Validation of supported key/value property types

Before vs After

Before the changes:

local myMap = someObject.SomeMapProperty  -- Gets TMap userdata
someOtherObject:FunctionThatTakesMap(myMap)  -- ERROR: Unsupported parameter type

After the changes:

local myMap = someObject.SomeMapProperty  -- Gets TMap userdata  
someOtherObject:FunctionThatTakesMap(myMap)  -- SUCCESS: Direct round-trip support

Impact on Lua Modding

This implementation enables:

• Seamless passing of TMap containers between Lua scripts and UE4 functions
• Preservation of native UE4 type semantics and performance characteristics
• Elimination of conversion overhead through intermediate Lua tables
• Complete container userdata ecosystem (TArray, TSet, TMap all fully supported)

Documentation Added

The analysis document (ANALYSIS.md) provides:

• Detailed technical explanation of the implementation
• Code examples showing the copying mechanism
• Comparison of before/after functionality
• Complete overview of container support status
• Impact assessment for modding capabilities

This documentation helps developers understand the significance of the TMap round-trip support implementation and how it completes the foundation for robust container manipulation in UE4SS Lua mods.

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