added several new features: --npub-to-hex, --hex-to-npub, --get-pubke…

…y-entity

       --npub-to-hex [<KEY>...]
           Convert one or multiple public keys in Bech32 format ('npub1...')
           into the corresponding 'hex' format. Details:: See also --hex-to-npub
       --hex-to-npub [<KEY>...]
           Convert one or multiple public keys in 'hex' format into the
           corresponding Bech32 ('npub1...') format. Details:: See also
           --npub-to-hex
       --get-pubkey-entity [<KEY>...]
           Get the entity of one or multiple public keys. Details:: This will
           show you for every public key given if the key represents a Nostr
           account (usually an individual) or a public Nostr channel. It might
           also return "Unknown" if the entity of the key cannot be determined.
           E.g. this can be helpful to determine if you want to use
           --subscribe-author or --subscribe-channel

.gitignore

@@ -23,3 +23,7 @@ README.md.*
 
 tmp/*
 
+local
+local/*
+
+