dev: rename `StarknetConfig` to `KakarotConfig` #133

Job	Run time
Linters / clippy	13m 13s
Linters / check	8m 22s
Spell check / spell-check	17s
Linters / fmt	1m 7s
Set up submodules / submodules	3m 17s
Dump katana state / dump	7m 8s
Rust tests / test	4m 56s
	38m 20s

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