feat: dibbler new genesis block with faucet utxos (tari-project#3688)

Description
---
Generates a new genesis block for `dibbler` network, with faucet utxos

Motivation and Context
---
Previous genesis block was missing faucet utxos

How Has This Been Tested?
---
- Relevant unit tests
- Built nodes, wallets, miner, started mining new chain, sent transactions between wallets
- Registered a new asset, minted tokens, but was unable to send token between wallets (could not find by unique id, I think that has changed recently)

applications/test_faucet/Cargo.toml

@@ -4,12 +4,14 @@ version = "0.22.1"
 authors = ["The Tari Development Community"]
 edition = "2018"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+simd = ["tari_crypto/simd"]
+avx2 = ["simd"]
 
 [dependencies]
 tari_crypto = { git = "https://github.com/tari-project/tari-crypto.git", branch = "main" }
 tari_utilities = "^0.3"
-tari_common_types ={path="../../base_layer/common_types"}
+tari_common_types = { path = "../../base_layer/common_types" }
 
 rand = "0.8"
 serde = { version = "1.0.97", features = ["derive"] }

applications/test_faucet/readme.md

@@ -0,0 +1,17 @@
+# testnet faucet utxo generator
+
+- To build the generator in release mode with avx2 enabled, run this command from the root folder of the tari repo:
+
+```bash
+RUSTFLAGS='-C target-feature=+avx2' cargo build --bin test_faucet --release --features avx2
+```
+
+- Copy the generated `test_faucet` binary from `target/release` to another folder
+- Navigate to that folder and execute the binary: `./test_faucet`
+- You should now have these additional files: `utxos.json` and `keys.json`
+
+- go to `print_new_genesis_block` test and check network is correct, then run the test to print the new raw block:
+
+```
+cargo test --package tari_core --test mempool -- helpers::block_builders::print_new_genesis_block --exact --nocapture --ignored
+```

applications/test_faucet/src/main.rs

@@ -117,6 +117,7 @@ async fn write_keys(mut rx: mpsc::Receiver<(TransactionOutput, PrivateKey, Micro
         excess,
         excess_sig: sig,
     };
+    let kernel = serde_json::to_string(&kernel).unwrap();
     let _ = utxo_file.write_all(format!("{}\n", kernel).as_bytes());
 
     println!("Done.");