Move cryptographic hashing procedures to crypto folder. (#2306)

Step towards https://github.com/paritytech/polkadot-sdk/issues/1975

As reported
https://github.com/paritytech/polkadot-sdk/issues/1975#issuecomment-1774534225
I'd like to encapsulate crypto related stuff in a dedicated folder.

Currently all cryptographic primitive wrappers are all sparsed in
`substrate/core` which contains "misc core" stuff.

To simplify the process, as the first step with this PR I propose to
move the cryptographic hashing there.

The `substrate/crypto` folder was already created to contains `ec-utils`
crate.

Notes:
- rename `sp-core-hashing` to `sp-crypto-hashing`
- rename `sp-core-hashing-proc-macro` to `sp-crypto-hashing-proc-macro`
- As the crates name is changed I took the freedom to restart fresh from
version 0.1.0 for both crates

---------

Co-authored-by: Robert Hambrock <roberthambrock@gmail.com>

substrate/primitives/crypto/hashing/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+name = "sp-crypto-hashing"
+version = "0.1.0"
+authors.workspace = true
+edition.workspace = true
+license = "Apache-2.0"
+homepage = "https://substrate.io"
+repository.workspace = true
+description = "Hashing primitives."
+documentation = "https://docs.rs/sp-crypto-hashing"
+
+[lints]
+workspace = true
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+blake2b_simd = { version = "1.0.1", default-features = false }
+byteorder = { version = "1.3.2", default-features = false }
+digest = { version = "0.10.3", default-features = false }
+sha2 = { version = "0.10.7", default-features = false }
+sha3 = { version = "0.10.0", default-features = false }
+twox-hash = { version = "1.6.3", default-features = false, features = ["digest_0_10"] }
+
+[dev-dependencies]
+criterion = "0.4.0"
+sp-crypto-hashing-proc-macro = { path = "proc-macro" }
+
+[[bench]]
+name = "bench"
+harness = false
+
+[lib]
+bench = false
+
+[features]
+default = ["std"]
+std = [
+	"blake2b_simd/std",
+	"byteorder/std",
+	"digest/std",
+	"sha2/std",
+	"sha3/std",
+	"twox-hash/std",
+]