feat: Add instance of SO(3) as topological group

HepLean/SpaceTime/LorentzGroup/Rotations.lean

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+/-
+Copyright (c) 2024 Joseph Tooby-Smith. All rights reserved.
+Released under Apache 2.0 license.
+Authors: Joseph Tooby-Smith
+-/
+import HepLean.SpaceTime.LorentzGroup.Orthochronous
+import HepLean.SpaceTime.LorentzGroup.Proper
+import HepLean.GroupTheory.SO3.Basic
+import Mathlib.GroupTheory.SpecificGroups.KleinFour
+import Mathlib.Topology.Constructions
+/-!
+# Rotations
+
+-/
+noncomputable section
+namespace spaceTime
+
+namespace lorentzGroup
+open GroupTheory
+
+
+
+
+end lorentzGroup
+
+
+end spaceTime
+end