Add a script to simplify creating and funding a new account. (#131)

Add a script for creating funded test accounts simply.

```
❯ scripts/create-and-fund-account.sh
{
  "name": "68334d7175fd4f86befa4902657e5270",
  "type": "local",
  "address": "ethm15r5x94km0swq55aszwd7hnr9wksq7wmr38xes7",
  "pubkey": "AuKqlSldJJXj4gYMFt2HeX9DJ3aUosYA7n6zBz9Tg7/i",
  "mnemonic": "umbrella bean special unaware accident giant distance mix ghost feel possible cost road grant endless man maple derive rebuild learn mask water attract resist",
  "bond": "3d3a73f09115d289d330781455e6eac217305dc4a20e19bde808011fe3775a93",
  "balance": 5000000000,
  "privkey": "480880fde7aff1461da584b436cb3a84692413c84623fda78e127bb4e704ce76"
}
```

Reviewed-on: https://git.vdb.to/cerc-io/laconicd/pulls/131
Co-authored-by: Thomas E Lackey <[email protected]>
Co-committed-by: Thomas E Lackey <[email protected]>

scripts/create-and-fund-account.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+AVG_RECORD_PHOTON=1000000
+NUM_RECORDS=5000
+BOND_OVERHEAD=200000
+KEYNAME=`uuidgen | tr -d '-'`
+KEYRING_DIR=`mktemp -d`
+KEYRING=test
+LACONIC_CONFIG=${LACONIC_CONFIG:-$HOME/.laconic/config.yml}
+BOND_AMOUNT=${1:-$((AVG_RECORD_PHOTON * NUM_RECORDS))}
+
+ACCOUNT_JSON=$(laconicd keys add $KEYNAME --keyring-backend $KEYRING --algo eth_secp256k1 --keyring-dir $KEYRING_DIR --output json)
+PRIVATE_KEY=$(yes | laconicd keys export $KEYNAME --keyring-backend $KEYRING --keyring-dir $KEYRING_DIR --unarmored-hex --unsafe)
+PUB_KEY=$(echo $ACCOUNT_JSON | jq -r ".pubkey | fromjson | .key")
+
+laconicd keys delete $KEYNAME --keyring-backend $KEYRING --keyring-dir $KEYRING_DIR -y 2> /dev/null
+rm -rf $KEYRING_DIR
+
+laconic -c $LACONIC_CONFIG cns tokens send --address $(echo $ACCOUNT_JSON | jq -r '.address') --type aphoton --quantity $((BOND_AMOUNT + BOND_OVERHEAD)) > /dev/null
+BOND_ID=$(laconic -c $LACONIC_CONFIG cns bond create --user-key $PRIVATE_KEY --type aphoton --quantity $BOND_AMOUNT | jq -r '.bondId')
+
+echo $ACCOUNT_JSON | jq ".bond = \"$BOND_ID\"" | jq ".balance = $BOND_AMOUNT" | jq ".privkey = \"$PRIVATE_KEY\"" | jq ".pubkey = \"$PUB_KEY\""