Make `composer` be the first param in gadgets #425

Job	Run time
Build Benchmarks	1m 17s
Dusk Analyzer / Dusk Analyzer	8s
Check encryption compiles without zk / Run tests	31s
Code Analysis / Clippy Check	13s
Code Analysis / Rust Format	7s
Tests all / Run tests	1m 2s
	3m 18s

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