added the create button in the empty state of the space screen and refactored some code

PreviewTests/Sources/GeneratedPreviewTests.swift

@@ -173,6 +173,7 @@ extension PreviewTests {
     }
 
     func testCreateRoomSpaceSelectionSheet() async throws {
+        AppSettings.resetAllSettings() // Ensure this test's previews start with fresh settings.
         for (index, preview) in CreateRoomSpaceSelectionSheet_Previews._allPreviews.enumerated() {
             try await assertSnapshots(matching: preview, step: index)
         }

PreviewTests/Sources/__Snapshots__/PreviewTests/spaceScreen.New-Space-iPad-en-GB.png

@@ -1,3 +1,3 @@
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-size 131043
+oid sha256:80f868c99906b7c84e2d9223af3fcdf0f9b840337163b6dedfd617663629f65c
+size 137783

PreviewTests/Sources/__Snapshots__/PreviewTests/spaceScreen.New-Space-iPad-pseudo.png

@@ -1,3 +1,3 @@
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-size 137412
+oid sha256:3840d243a457a5469cd1d94b1b43121a222204a5ddd66e848df6b137a231b5df
+size 145959

PreviewTests/Sources/__Snapshots__/PreviewTests/spaceScreen.New-Space-iPhone-en-GB.png

@@ -1,3 +1,3 @@
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-size 86553
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+size 92051

PreviewTests/Sources/__Snapshots__/PreviewTests/spaceScreen.New-Space-iPhone-pseudo.png

@@ -1,3 +1,3 @@
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-size 96839
+oid sha256:3967452bce1adb55c30f7f5409c467657d0640935ee580560ecda1620952ecf3
+size 105035