Add criterion benchmarks for DHKE #1010

Job	Run time
Format	11s
Build (stable, -p cdk)	1m 29s
Build WASM (stable, -p cdk)	1m 34s
Build (stable, -p cdk --no-default-features)	3m 31s
Build WASM (stable, -p cdk --no-default-features)	3m 33s
Build (stable, -p cdk --no-default-features --features wallet)	1m 32s
Build (stable, -p cdk --no-default-features --features mint)	1m 26s
Build (stable, -p cdk-redb)	1m 48s
Build WASM (stable, -p cdk --no-default-features --features wallet)	1m 27s
Build (stable, -p cdk-sqlite)	2m 8s
Build WASM (stable, -p cdk-js)	1m 30s
Build (stable, -p cdk-axum)	1m 17s
Build (stable, -p cdk-cln)	1m 34s
Build (stable, -p cdk-fake-wallet)	1m 10s
Build (stable, -p cdk-strike)	1m 43s
Build (stable, --bin cdk-cli)	3m 2s
Build (stable, --bin cdk-mintd)	2m 56s
Build (stable, --examples)	1m 53s
	33m 44s

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