CMake: use list of experimental feature UUIDs per Cmake version

[OldDev78]

Temporarily provide a short list of possible C++23 modules experimental feature UUIDs for a few different CMake versions.

Minimum CMake version currently is 4.0.0

Summary by CodeRabbit

• Chores
  • Lowered minimum CMake version requirement from 4.2 to 4.0, expanding compatibility with older build environments.
  • Updated build configuration to conditionally handle experimental C++ import features based on CMake version compatibility.

[coderabbitai]

📝 Walkthrough

Walkthrough

CMake configuration was made version-aware: CMAKE_EXPERIMENTAL_CXX_IMPORT_STD is now assigned conditionally in CMakeLists.txt based on CMAKE_VERSION. The project minimum CMake requirement was changed. A redundant CMAKE_EXPERIMENTAL_CXX_IMPORT_STD cache entry was removed from CMakePresets.json.

Changes

Cohort / File(s)	Summary
Primary CMake file CMakeLists.txt	Lowered cmake_minimum_required(VERSION) from 4.2 to 4.0. Introduced conditional assignments for CMAKE_EXPERIMENTAL_CXX_IMPORT_STD using distinct UUID values for CMAKE_VERSION >= 4.3.0, >= 4.0.3, and >= 4.0.0; left it unset otherwise.
Presets configuration CMakePresets.json	Changed cmakeMinimumRequired constraint from 4.0.3 → 4.0.0. Removed the CMAKE_EXPERIMENTAL_CXX_IMPORT_STD entry from the hidden configurePresets[0].cacheVariables; other cache variables unchanged.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 I hopped through CMake fields today,
UUIDs in paw I tucked away.
Versions checked with gentle thump,
No hardcoded bits to make me jump.
A tidy build — now off I play! 🥕

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: introducing version-specific experimental feature UUIDs for CMake, replacing a fixed commented assignment with conditional logic based on CMAKE_VERSION.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@CMakeLists.txt`:
- Around line 3-9: The branch with elseif (CMAKE_VERSION VERSION_GREATER_EQUAL
"4.0.0") is unreachable given cmake_minimum_required(VERSION 4.2); remove that
elseif block (the lines that set CMAKE_EXPERIMENTAL_CXX_IMPORT_STD for
"a9e1cf81-9932-4810-974b-6eccaf14e457") to eliminate dead code, or alternatively
lower cmake_minimum_required to 4.0.0 if you truly need to support 4.0.0–4.0.2;
update CMake logic around CMAKE_VERSION and the remaining
set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD ...) branches accordingly.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 6397cc07-77c0-4441-8292-188f472413a0

📥 Commits

Reviewing files that changed from the base of the PR and between 0383654 and a73bbe5.

📒 Files selected for processing (2)

• CMakeLists.txt
• CMakePresets.json

[AR-DEV-1]

LGTM

[AR-DEV-1]

@mcdubhghlas @Arctis-Fireblight Please review & merge, I need it for the rendering submodules PR & RHI. Thanks.