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/Services/CommandProcessor.swift

@@ -63,7 +63,7 @@ class CommandProcessor {
         case "/unfav":
             if inGeoPublic || inGeoDM { return .error(message: "favorites are only for mesh peers in #mesh") }
             return handleFavorite(args, add: false)
-        // /help removed
+        //
         case "/help", "/h":
             return .error(message: "unknown command: \(cmd)")
         default: