Documentation: Add md-book documentation + Rustdocs

[talekhinezh]

• Add md book documentation on Radix Engine internals
• Add more rustdocs on apis at each layer

[github-actions]

Docker tags
docker.io/radixdlt/private-scrypto-builder:a35e2e10ae

[github-actions]

Benchmark for a35e2e1

Click to view benchmark

Test	Base	PR	%
costing::bench_prepare_wasm	66.0±0.16ms	65.5±0.15ms	-0.76%
costing::decode_sbor	10.9±0.01µs	10.7±0.04µs	-1.83%
costing::decode_sbor_bytes	29.2±0.06µs	29.5±0.13µs	+1.03%
costing::deserialize_wasm	1286.2±3.99µs	1295.5±2.77µs	+0.72%
costing::instantiate_flash_loan	4.0±0.70ms	3.9±0.52ms	-2.50%
costing::instantiate_radiswap	5.7±0.06ms	5.8±0.07ms	+1.75%
costing::spin_loop	21.9±0.22ms	22.2±0.18ms	+1.37%
costing::validate_sbor_payload	29.9±0.05µs	26.1±0.03µs	-12.71%
costing::validate_sbor_payload_bytes	250.2±0.76ns	229.1±0.54ns	-8.43%
costing::validate_secp256k1	76.4±0.18µs	76.4±0.09µs	0.00%
costing::validate_wasm	36.8±0.03ms	36.3±0.05ms	-1.36%
decimal::add/0	8.4±0.00ns	8.4±0.00ns	0.00%
decimal::add/rust-native	9.8±0.00ns	9.8±0.00ns	0.00%
decimal::add/wasmer	111.5±0.14ns	112.6±0.12ns	+0.99%
decimal::add/wasmer-call-native	455.6±0.37ns	456.5±0.47ns	+0.20%
decimal::add/wasmi	585.0±0.52ns	674.0±2.77ns	+15.21%
decimal::add/wasmi-call-native	5.3±0.02µs	5.5±0.01µs	+3.77%
decimal::div/0	189.7±0.11ns	189.7±0.37ns	0.00%
decimal::from_string/0	154.6±0.33ns	154.3±0.24ns	-0.19%
decimal::mul/0	142.6±0.29ns	142.7±0.15ns	+0.07%
decimal::mul/rust-native	139.6±0.06ns	138.1±0.29ns	-1.07%
decimal::mul/wasmer	1507.5±1.70ns	1513.8±0.48ns	+0.42%
decimal::mul/wasmer-call-native	568.5±0.76ns	570.1±0.50ns	+0.28%
decimal::mul/wasmi	42.3±0.10µs	41.5±0.06µs	-1.89%
decimal::mul/wasmi-call-native	5.5±0.01µs	5.7±0.01µs	+3.64%
decimal::pow/0	654.4±0.29ns	653.9±0.68ns	-0.08%
decimal::pow/rust-native	633.7±1.15ns	631.8±0.57ns	-0.30%
decimal::pow/wasmer	6.6±0.00µs	6.6±0.01µs	0.00%
decimal::pow/wasmer-call-native	1055.7±1.84ns	1036.9±2.04ns	-1.78%
decimal::pow/wasmi	200.0±0.38µs	192.4±0.26µs	-3.80%
decimal::pow/wasmi-call-native	5.4±0.01µs	5.5±0.00µs	+1.85%
decimal::root/0	7.8±0.01µs	7.8±0.01µs	0.00%
decimal::sub/0	8.5±0.01ns	8.5±0.01ns	0.00%
decimal::to_string/0	435.8±0.39ns	435.1±0.45ns	-0.16%
precise_decimal::add/0	10.0±0.01ns	10.0±0.01ns	0.00%
precise_decimal::add/rust-native	11.4±0.00ns	11.4±0.00ns	0.00%
precise_decimal::add/wasmer	118.4±0.16ns	118.6±0.09ns	+0.17%
precise_decimal::add/wasmer-call-native	488.6±0.38ns	495.8±0.74ns	+1.47%
precise_decimal::add/wasmi	757.3±0.92ns	823.4±3.84ns	+8.73%
precise_decimal::add/wasmi-call-native	6.8±0.01µs	6.9±0.01µs	+1.47%
precise_decimal::div/0	303.8±3.32ns	302.7±1.72ns	-0.36%
precise_decimal::from_string/0	194.9±0.23ns	195.1±0.13ns	+0.10%
precise_decimal::mul/0	370.8±5.47ns	374.7±1.70ns	+1.05%
precise_decimal::mul/rust-native	302.8±0.43ns	303.2±0.61ns	+0.13%
precise_decimal::mul/wasmer	3.4±0.00µs	3.4±0.00µs	0.00%
precise_decimal::mul/wasmer-call-native	878.5±1.46ns	845.1±0.62ns	-3.80%
precise_decimal::mul/wasmi	107.7±0.24µs	106.3±0.14µs	-1.30%
precise_decimal::mul/wasmi-call-native	7.3±0.01µs	7.3±0.01µs	0.00%
precise_decimal::pow/0	1919.5±4.36ns	1912.0±7.74ns	-0.39%
precise_decimal::pow/rust-native	1497.9±2.63ns	1459.1±2.69ns	-2.59%
precise_decimal::pow/wasmer	16.1±0.03µs	16.1±0.01µs	0.00%
precise_decimal::pow/wasmer-call-native	2.2±0.00µs	2.2±0.00µs	0.00%
precise_decimal::pow/wasmi	521.2±1.27µs	512.3±1.40µs	-1.71%
precise_decimal::pow/wasmi-call-native	13.2±0.04µs	13.3±0.02µs	+0.76%
precise_decimal::root/0	56.4±0.06µs	57.1±0.04µs	+1.24%
precise_decimal::sub/0	9.6±0.02ns	9.6±0.01ns	0.00%
precise_decimal::to_string/0	721.7±1.62ns	719.7±3.10ns	-0.28%
schema::validate_payload	343.3±0.43µs	342.0±0.55µs	-0.38%
transaction::radiswap	5.4±0.02ms	5.3±0.03ms	-1.85%
transaction::transfer	1745.1±7.22µs	1750.0±14.09µs	+0.28%
transaction_processing::prepare	2.2±0.00ms	2.3±0.00ms	+4.55%
transaction_processing::prepare_and_decompile	6.1±0.02ms	6.2±0.04ms	+1.64%
transaction_processing::prepare_and_decompile_and_recompile	24.5±0.10ms	24.6±0.79ms	+0.41%
transaction_validation::validate_manifest	42.1±0.06µs	42.1±0.03µs	0.00%
transaction_validation::verify_bls_2KB	1062.3±79.75µs	1097.4±136.62µs	+3.30%
transaction_validation::verify_bls_32B	1095.9±121.73µs	1061.3±122.83µs	-3.16%
transaction_validation::verify_ecdsa	74.3±0.11µs	74.3±0.05µs	0.00%
transaction_validation::verify_ed25519	55.1±0.20µs	54.6±0.17µs	-0.91%

[iamyulong]

Really good documentation!