feat(marmot-interop): add nostr.bitcoiner.social + nostr.mom to defaults

Broaden the default public relay set for the interactive harness so
kind:1059 gift wraps and kind:10050 inbox lists have more landing
spots that don't pre-filter Marmot traffic out. Both relays are
known to accept kinds outside the core "note / metadata / contacts"
trio that damus/primal tend to restrict.

The Amethyst-side setup instructions are rendered from the same list,
so operators who configure Amethyst per the harness prompt get the
same five URLs on the app side too.

tools/marmot-interop/marmot-interop.sh

@@ -34,7 +34,13 @@ C_HEX=""
 A_NPUB=""
 A_HEX=""
 
-DEFAULT_RELAYS=( "wss://relay.damus.io" "wss://nos.lol" "wss://relay.primal.net" )
+DEFAULT_RELAYS=(
+  "wss://relay.damus.io"
+  "wss://nos.lol"
+  "wss://relay.primal.net"
+  "wss://nostr.bitcoiner.social"
+  "wss://nostr.mom"
+)
 USE_LOCAL_RELAYS=0
 ENABLE_TRANSPONDER=0
 NO_BUILD=0