Add automation price pallet

[imstar15]

Tests

running 23 tests
test mock::test_genesis_config_builds ... ok
test mock::__construct_runtime_integrity_test::runtime_integrity_tests ... ok
test tests::test_cancel_task_works ... ok
test tests::test_expired_task_not_run ... ok
test tests::test_decrease_task_count_when_execute_tasks ... ok
test tests::test_delete_asset_ok ... ok
test tests::test_emit_event_when_execute_tasks ... ok
test tests::test_gt_task_not_run_when_asset_price_equal_target_price ... ok
test tests::test_initialize_asset_works ... ok
test tests::test_price_move_against_target_price_skip_run ... ok
test tests::test_schedule_put_task_to_expiration_queue ... ok
test tests::test_schedule_return_error_when_reaching_max_account_tasks_limit ... ok
test tests::test_initialize_asset_reject_duplicate_asset ... ok
test tests::test_schedule_put_task_to_expiration_queue_multi ... ok
test tests::test_schedule_return_error_when_reaching_max_tasks_overall_limit ... ok
test tests::test_schedule_xcmp_task_fail_not_enough_balance ... ok
test tests::test_schedule_xcmp_task_ok ... ok
test tests::test_update_asset_price_increase_round ... ok
test tests::test_shift_tasks_movement_through_price_changes ... ok
test tests::test_update_asset_prices ... ok
test tests::test_update_asset_prices_multi ... ok
test tests::test_sweep_expired_task_partially ... ok
test tests::test_sweep_expired_task_works ... ok

test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s


running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s