PR / feat: migrate to dedicated AWS account and update CI #5

Job	Run time
Check PR	16s
Paths Filter	4s
CI / Check App / Clippy	1m 15s
CI / Check App / Formatting	24s
CI / Check App / Licenses	31s
CI / Check App / Unit Tests	1m 4s
CI / Check App / Tests Suite "${{ matrix.element }}"	0s
CI / Check Infra / Formatting	7s
CI / Check Infra / TFLint	27s
CI / Check App / Unused Dependencies	1m 18s
CI / Check Infra / Validate	19s
CI / Check Infra / TFSec	32s
CI / Plan Infra ❱❱ staging / Plan `staging`	1m 8s
CI / Plan Infra ❱❱ prod / Plan `prod`	1m 4s
Merge Check	0s
	8m 29s

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