Add DA_RenderPipelineProfile and Platform Render Profiles documentation

- Introduced DA_RenderPipelineProfile data asset to define rendering pipeline configurations for various platforms and quality tiers.
- Documented enums, structs, variables, and default preset tables for render settings.
- Created a comprehensive developer guide for setting up platform-specific render profiles, including file structure, profile creation, and integration with upscalers.
- Included validation rules, console variable references, and testing matrices for ensuring compliance with platform requirements.

docs/checklists/cpp-blueprint-status.md

@@ -182,6 +182,7 @@ Abbreviations:
 |---|--------|-----|---------|----------|
 | 102-114 | All 13 systems | 🔵 | ✅ | BP children + widget BPs |
 | 148 | `BPC_HapticsController` | 🔵 (Blueprint-only) | ✅ | ⬜ BP child attach to PlayerController |
+| 149 | `BPC_RenderPipelineManager` | 🔵 (Blueprint-only) | ✅ | ⬜ BP child attach to PlayerController |
 
 ### Data Assets (14-data-assets — 16 systems)