Hostr - Hive to Nostr bidirectional bridge

This is the hostr bidirectional bridge. The goal:

• anything posted on Nostr will auto-post to a Hive account
• anything posted on Hive will auto-post to a Nostr account

Currently, the bidirectional bridge is being used (automatically goes either way). But, a Nostr-to-Hive bridge only could be set up. Or, a Hive-to-Nostr bridge could be set up.