Fix CMake 4.0+ generation error

[Dove6]

Starting with CMake 4.0, an error is thrown if there is no minimum version specified:

https://cmake.org/cmake/help/latest/policy/CMP0000.html#policy:CMP0000

I've set to to 3.10, because a) it cannot be set lower than 3.5 b) support for versions below 3.10 is going to be cut soon according to a warning.

[gemini-code-assist]

Summary of Changes

Hello @Dove6, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a build issue encountered with CMake versions 4.0 and later by introducing a mandatory minimum version declaration into the CMake template. This change ensures that projects built with this template remain compatible with modern CMake practices, preventing build failures and aligning with future deprecation policies for older CMake versions.

Highlights

• CMake Compatibility Fix: Addresses a build generation error that occurs with CMake versions 4.0 and newer, which now require an explicit minimum version to be specified.
• Minimum Version Set: The cmake_minimum_required version has been set to 3.10. This version was chosen as it's above the lowest supported 3.5 and preemptively handles warnings about upcoming deprecation for versions below 3.10.

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[gemini-code-assist]

Code Review

This pull request correctly addresses a compatibility issue with modern CMake versions by adding the cmake_minimum_required(VERSION 3.10) directive to the cmake_template. This change is necessary to prevent build failures, as newer CMake versions require the minimum version to be specified. The choice of version 3.10 is reasonable and well-justified in the pull request description. The implementation is correct and follows best practices. The change is approved.