Cleanup: remove dead code, normalize fingerprints, modernize share extension, trim test noise, and drop ‘preparing to share…’ message (#520)

* Remove dead code and artifacts: drop PeerManager, unused views/types; delete LegacyTestProtocolTypes; update .gitignore; purge TestResult.xcresult and build.log

* Tests: gate verbose prints under DEBUG; ChatViewModel: remove legacy fingerprint helper and rely on UnifiedPeerService

* Share Extension: migrate to UIKit + UTTypes; drop Social/SLComposeServiceViewController

* Remove 'preparing to share …' system message; send shared content immediately

* Inline comment cleanup: drop legacy 'removed' breadcrumbs across protocols, services, view model, and views

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Co-authored-by: jack <jackjackbits@users.noreply.github.com>

bitchat/Protocols/BitchatProtocol.swift

@@ -181,8 +181,7 @@ enum LazyHandshakeState {
     case failed(Error)         // Handshake failed
 }
 
-// MARK: - Special Recipients (removed)
-// Previously defined broadcast identifiers were unused; removed for simplicity.
+//
 
 // MARK: - Core Protocol Structures
 
@@ -268,8 +267,7 @@ struct BitchatPacket: Codable {
     }
 }
 
-// MARK: - Delivery Acknowledgments (removed)
-// Legacy DeliveryAck structures are no longer used; delivery status flows via Noise payloads.
+//
 
 // MARK: - Read Receipts
 
@@ -361,7 +359,7 @@ struct ReadReceipt: Codable {
 }
 
 
-// PeerIdentityBinding removed (unused).
+//
 
 
 // MARK: - Delivery Status