refactor: dynamic loading and choosing AI model in assistant dialog (… #4597

Job	Run time
Prepare version string	3s
Build / Build Linux (arm64)	3m 21s
Build / Build Linux	3m 8s
Build / Build Windows ARM64	3m 44s
Build / Build macOS (Intel)	5m 43s
Build / Build macOS (Apple Silicon)	2m 45s
Build / Build Windows x64	3m 42s
Package / Package macOS (osx-x64)	17s
Package / Package Windows (win-x64)	22s
Package / Package Windows (win-arm64)	22s
Package / Package Linux (linux-arm64)	55s
Package / Package macOS (osx-arm64)	17s
Package / Package Linux (linux-x64)	1m 9s
	25m 48s

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