P: Use environment variables in metadata presets

Allow Lightroom Classic to read system environment variables in presets.
If I had a environment variable set on my system, such as 
YYYY= 2025

And I used %YYYY% in a preset, such as 
["com.adobe.copyright"] = "Bob Scola (c) %YYYY% Seattle WA "

Then the preset would apply the string:   Bob Scola (c) 2025 Seattle WA