ScriptableObjectUtility.Create refactor to behave like the rest of Unity

[glabute]

Purpose of this PR

CMCL-1721

Creating a new Cinemachine asset in the project window now has the same look and feel as creating a new MonoBehaviour

Testing status

• Added an automated test
• Passed all automated tests
• Manually tested

Documentation status

• Updated CHANGELOG
• Updated README (if applicable)
• Commented all public classes, properties, and methods
• Updated user documentation

Technical risk

low

[u-pr-agent]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪ The PR is a small, straightforward refactor that replaces custom logic with a standard Unity Editor API, making it very easy to review and validate.

🏅 Score: 100 This is an excellent refactor that correctly replaces a complex, non-standard implementation with the proper Unity Editor API, improving code maintainability and providing a more consistent user experience.

🧪 No relevant tests

🔒 No security concerns identified

⚡ No major issues detected

---

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[codecov-github-com]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...emachine/Editor/Utility/ScriptableObjectUtility.cs	0.00%	9 Missing ⚠️

@@            Coverage Diff             @@
##             main    #1091      +/-   ##
==========================================
- Coverage   17.24%   17.22%   -0.02%     
==========================================
  Files         209      209              
  Lines       23721    23679      -42     
==========================================
- Hits         4090     4079      -11     
+ Misses      19631    19600      -31     

Flag	Coverage Δ
cinemachine_MacOS_2022.3	?
cinemachine_MacOS_6000.0	?
cinemachine_MacOS_6000.2	?
cinemachine_MacOS_6000.3	?
cinemachine_MacOS_6000.4	?
cinemachine_Ubuntu_2022.3	?
cinemachine_Ubuntu_6000.0	?
cinemachine_Ubuntu_6000.2	?
cinemachine_Ubuntu_6000.3	?
cinemachine_Ubuntu_6000.4	?
cinemachine_Windows_2022.3	17.27% <0.00%> (+0.02%)	⬆️
cinemachine_Windows_6000.0	17.16% <0.00%> (+0.02%)	⬆️
cinemachine_Windows_6000.2	17.16% <0.00%> (+0.02%)	⬆️
cinemachine_Windows_6000.3	17.16% <0.00%> (+0.02%)	⬆️
cinemachine_Windows_6000.4	17.16% <0.00%> (+0.02%)	⬆️

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Files with missing lines	Coverage Δ
...emachine/Editor/Utility/ScriptableObjectUtility.cs	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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