Create a justfile to load whatever chain env variables we need on demand

[kerber0x]

It would be awesome to create a justfile to load the env variables into the terminal.

An example of how to use this tool would be just load migaloo, which would be the equivalent to inputing in the terminal:

export CHAIN_ID="migaloo-1"
export DENOM="uwhale"
export BINARY="migalood"
export RPC="https://migaloo-rpc.polkachu.com:443"

if [ -n "$ZSH_VERSION" ]; then
    # Using an array for TXFLAG
    TXFLAG=(--node $RPC --chain-id $CHAIN_ID --gas-prices 0.25$DENOM --gas auto --gas-adjustment 1.3 -y -b block --output json)
else
    # Using a string for TXFLAG
    TXFLAG="--node $RPC --chain-id $CHAIN_ID --gas-prices 0.25$DENOM --gas auto --gas-adjustment 1.3 -y -b block --output json"
fi

export TXFLAG

This would enhance the dev experience by a lot.