Add class `KoreDefn` #7148

Job	Run time
Java: Linting	1m 23s
Pyk: Code Quality & Unit Tests (3.10)	1m 27s
Pyk: Code Quality & Unit Tests (3.11)	1m 17s
Pyk: Code Quality & Unit Tests (3.12)	1m 25s
Pyk: Code Quality & Unit Tests (3.13)	2m 8s
Code Quality Checks	1s
K: Source Build & Test	1m 16s
Pyk: Nix Build (ubuntu-latest)	48s
Pyk: Nix Build (macos-14)	1m 13s
K: Ubuntu Jammy Frontend Package	1m 16s
K: Nix Build & Test (self-hosted, linux, normal)	1m 16s
K: Ubuntu Jammy Package	1m 29s
K: Nix Build & Test (MacM1, self-macos-12)	1m 19s
Pyk: Profiling	1s
Pyk: Documentation	1s
Pyk: Integration Tests	1s
Pyk: Regression Tests	1s
	16m 22s

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