This PR introduces a new command group, stamper, to manage postage batches for Bee nodes, and enhances the existing node-funder functionality. It also includes fixes and improvements related to cluster setup and configuration usage.

Features Introduced

Stamper Command

The stamper command group is designed to handle postage batches with the following subcommands:

1. create:
   Creates a new postage batch for selected nodes with customizable parameters like amount, depth, and timeout.

2. topup:
   Tops up postage batches for selected nodes based on specified thresholds for TTL and periodic checks.

3. dilute:
   Dilutes existing postage batches by increasing the depth based on utilization thresholds.

4. set:
   Combines the functionalities of topup, and dilute to manage postage batches comprehensively.

Periodic checks for topup, dilute, and set subcommands are handled by the scheduler package.

Node-Funder Enhancements

• Added --periodic-check flag to support periodic execution of funding operations.

Fixes and Improvements

• Enhanced cluster setup process.
• Improved configuration handling for better flexibility and usability.