Introduce a new module and interface for serving files via TFTP in the HAClusterTopology structure. This includes adding the necessary dependencies, creating the `TftpServer` trait, implementing it where appropriate, and integrating its usage within the topology struct.
Reviewed-on: https://git.nationtech.io/NationTech/harmony/pulls/10
Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Co-committed-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
