Introduce SchedulingStateMachine for unified scheduler (#129) #28

Job	Run time
cargo-test-sbf (token/program)	41s
check	0s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	42s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	1m 51s
test	0s
cargo-test-sbf (token-upgrade/program)	26s
cargo-test-sbf (feature-proposal/program)	1m 57s
cargo-test-sbf (governance/addin-mock/program, governance/program)	52s
cargo-test-sbf (memo/program)	1m 51s
cargo-test-sbf (name-service/program)	1m 51s
cargo-test-sbf (stake-pool/program)	27s
cargo-test-sbf (single-pool/program)	1m 5s
	11m 43s

Provide feedback