Cardano Updates

Enhanced assetAmount Calculation for the asset-infofile assetAmount

Changes:

 - Subroutine added in 00_common.sh for the UTXO filtering
 - Option added to work with selected UTXOs in the scripts 01_sendLovelaces.sh, 01_sendAssets.sh, 01_claimRewards.sh
 - Changed the assetAmount calculation and verification to use 'bc' instead of plain bash systax to overcome the bash max. number limitations

Changes:

 - Added the How-To to use the importHelper Tool
 - Added some information about StakePoolRetirement
 - Added links to "How to build/install the cardano-node"
 - Updated Script-Syntax for the now available Expert-Option to specify the exact UTXOs the scripts should need for the transaction. This new feature is available for the following scripts: 01_sendLovelaces.sh, 01_sendAssets.sh, 01_claimRewards.sh
 - Added information on how to use multiple Accounts on Hardware-Wallets

Changes:

 - Added the How-To to use the importHelper Tool
 - Added some information about StakePoolRetirement
 - Added links to "How to build/install the cardano-node"
 - Updated Script-Syntax for the now available Expert-Option to specify the exact UTXOs the scripts should need for the transaction. This new feature is available for the following scripts: 01_sendLovelaces.sh, 01_sendAssets.sh, 01_claimRewards.sh

Changes:

 - using the raw utxo output for now converting it over to a json with stringified numbers to overcome the jq bug with bigger numbers. otherwise there could be a problem with assetscounts over 9B
- changed the assetName handling to overcome the utf-8 assetname problem in the utxo json. now it works with the customized utxo json creation.
- added the output of the TxID-Hash on each transaction
- added a https link in addition for a quick verification via cardanoscan on mainnet
- added a short "continue" question before processing a connected hw-wallet in the stakepool registration process to be able to swap out hw-wallets if you have more than one of those in your setup and all of them set to local-verification
- added a hidden option to skip the "are you sure" prompt when transmitting a metafile on the chain
- lifted the ticker specification to allow lowercase chars too