fix: bump CMake minimum version to 3.25.2

[Copilot]

Summary

This PR bumps the CMake minimum required version from 3.16 to 3.25.2 across the repository to support the RUN_OUTPUT_STDOUT_VARIABLE option used in source/cmake/Findtensorflow.cmake.

Background

PR #4890 introduced the use of RUN_OUTPUT_STDOUT_VARIABLE in the try_run() command within source/cmake/Findtensorflow.cmake (line 297). This CMake feature was added in CMake 3.25, but the minimum required version was still set to 3.16, which would cause build failures on systems with older CMake versions.

Additionally, CMake 3.25.0 and 3.25.1 contain a bug (https://gitlab.kitware.com/cmake/cmake/-/issues/24275), so the minimum version is set to 3.25.2 to avoid this issue.

Changes

This PR updates the CMake version requirements consistently across all build configuration files:

• Main CMakeLists.txt: Updated base requirement and conditional requirements for CUDA/ROCM variants
• Python build configuration (backend/read_env.py): Updated version requirements for CPU, CUDA, and ROCM variants
• Documentation (doc/install/install-from-source.md): Simplified to state that CMake 3.25.2+ is required for all platforms
• Test and example CMakeLists: Updated all test directories and example projects to require CMake 3.25.2 for consistency

Files Modified

• source/CMakeLists.txt
• backend/read_env.py
• doc/install/install-from-source.md
• source/lib/src/gpu/CMakeLists.txt
• source/lib/tests/CMakeLists.txt
• source/api_c/tests/CMakeLists.txt
• source/api_cc/tests/CMakeLists.txt
• source/lmp/plugin/CMakeLists.txt
• examples/infer_water/CMakeLists.txt

Impact

Users will need CMake 3.25.2 or later to build DeePMD-kit from source. CMake 3.25.2 was released in March 2022, so it should be widely available. Users can easily install or upgrade CMake via pip:

pip install -U cmake

Fixes the issue where builds would fail with CMake versions between 3.16 and 3.24 due to the use of RUN_OUTPUT_STDOUT_VARIABLE, and avoids the bug present in CMake 3.25.0 and 3.25.1.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[BUG] CMake minimal version should be bumped to 3.25</issue_title>
<issue_description>### Bug summary

#4890 uses RUN_OUTPUT_STDOUT_VARIABLE which is new in CMake 3.25. Thus, the CMake minimal version should be bumped to 3.25 in CMakeLists.txt, read_env.py, and the documentation.

DeePMD-kit Version

devel

Backend and its version

How did you download the software?

Built from source

Input Files, Running Commands, Error Log, etc.

As above.

Steps to Reproduce

As above.

Further Information, Files, and Links

No response</issue_description>

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

Fixes #5000

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[Copilot]

Pull Request Overview

This PR updates the CMake minimum required version from 3.16 to 3.25 across the repository to support the RUN_OUTPUT_STDOUT_VARIABLE option used in the TensorFlow finder module, which was introduced in PR #4890.

• Standardizes CMake version requirement to 3.25 for all build variants (CPU, CUDA, ROCM)
• Updates build configuration files, test directories, and examples consistently
• Simplifies documentation to reflect the unified version requirement

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
source/CMakeLists.txt	Updated main CMake requirement and variant-specific requirements
backend/read_env.py	Updated version requirements for all build variants in Python configuration
doc/install/install-from-source.md	Simplified documentation to reflect unified 3.25 requirement
source/lib/src/gpu/CMakeLists.txt	Updated GPU library CMake requirements with clarified comments
source/lib/tests/CMakeLists.txt	Updated test directory CMake requirement
source/api_c/tests/CMakeLists.txt	Updated C API test CMake requirement
source/api_cc/tests/CMakeLists.txt	Updated C++ API test CMake requirement
source/lmp/plugin/CMakeLists.txt	Updated LAMMPS plugin CMake requirement
examples/infer_water/CMakeLists.txt	Updated example project CMake requirement

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.28%. Comparing base (54dae2f) to head (90ddec1).
⚠️ Report is 74 commits behind head on devel.

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #5001      +/-   ##
==========================================
- Coverage   84.29%   84.28%   -0.02%     
==========================================
  Files         708      708              
  Lines       69899    69910      +11     
  Branches     3605     3607       +2     
==========================================
  Hits        58922    58922              
- Misses       9820     9831      +11     
  Partials     1157     1157              

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