Tests

Add chat `/model` command #1352

Job	Run time
unit-test (macos-latest, 24)	2m 57s
unit-test (ubuntu-24.04, 24)	59s
jvm-integration-test (macos-latest, 24)	7m 20s
jvm-integration-test (windows-latest, 24)	5m 49s
graalvm-build	4m 35s
unit-test (windows-latest, 24)	1m 14s
jvm-integration-test (ubuntu-24.04, 24)	3m 19s
nix-build	7m 57s
graalvm-integration-test	1m 11s
	35m 21s

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