Convert the remaining tests to Swift Testing (#781)

* SwiftTesting: NoiseProtocolTests + BinaryProtocolPaddingTests

* SwiftTesting: `NotificationStreamAssemblerTests`

* SwiftTesting: `NostrProtocolTests`

* SwiftTesting: `BinaryProtocolTests`

* SwiftTesting: `PeerIDTests`

* SwiftTesting: `BLEServiceTests`

* SwiftTesting: `CommandProcessorTests`

* SwiftTesting: `GCSFilterTests`

* SwiftTesting: `GeohashBookmarksStoreTests`

* Remove `peerID` test constants

* Remove PeerID + String interop from tests

* Refactor IntegrationTests to extract state management

* Refactor global state management of MockBLEService

* NoiseProtocolSwiftTests: `actor` -> `struct`

* Remove measurement tests w/ no benchmark

* `NoiseProtocolSwiftTests` -> `NoiseProtocolTests`

* SwiftTesting: `LocationChannelsTests`

* SwiftTesting: `GossipSyncManagerTests`

* SwiftTesting: `LocationNotesManagerTests`

* Global `sleep` function for tests

* SwiftTesting: `IntegrationTests`

---------

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

bitchatTests/Mocks/MockBLEBus.swift

@@ -0,0 +1,57 @@
+//
+// MockBLEBus.swift
+// bitchatTests
+//
+// This is free and unencumbered software released into the public domain.
+// For more information, see <https://unlicense.org>
+//
+
+import Foundation
+@testable import bitchat
+
+final class MockBLEBus {
+    private var registry: [PeerID: MockBLEService] = [:]
+    private var adjacency: [PeerID: Set<PeerID>] = [:]
+
+    // Enable automatic flooding for public messages in integration tests only
+    let autoFloodEnabled: Bool
+    
+    init(autoFloodEnabled: Bool = false) {
+        self.autoFloodEnabled = autoFloodEnabled
+    }
+
+    func register(_ service: MockBLEService, for peerID: PeerID) {
+        registry[peerID] = service
+        if adjacency[peerID] == nil { adjacency[peerID] = [] }
+    }
+
+    func connect(_ a: PeerID, _ b: PeerID) {
+        var setA = adjacency[a] ?? []
+        setA.insert(b)
+        adjacency[a] = setA
+        var setB = adjacency[b] ?? []
+        setB.insert(a)
+        adjacency[b] = setB
+    }
+
+    func disconnect(_ a: PeerID, _ b: PeerID) {
+        if var setA = adjacency[a] { setA.remove(b); adjacency[a] = setA }
+        if var setB = adjacency[b] { setB.remove(a); adjacency[b] = setB }
+    }
+
+    func neighbors(of peerID: PeerID) -> [MockBLEService] {
+        let ids = adjacency[peerID] ?? []
+        let result = ids.compactMap { registry[$0] }
+        return result
+    }
+
+    func isDirectNeighbor(_ a: PeerID, _ b: PeerID) -> Bool {
+        let res = adjacency[a]?.contains(b) ?? false
+        return res
+    }
+
+    func service(for peerID: PeerID) -> MockBLEService? {
+        let svc = registry[peerID]
+        return svc
+    }
+}