Minor - V0.3.0 - Ajoute frein classique et frein à main - V

Adds a traditional brake alongside the existing handbrake functionality.

This change allows for more controlled deceleration using a standard braking system and introduces a brake power parameter in the vehicle controller for further adjustment. The input manager is updated to accommodate a new brake input, and the vehicle controller uses this input to apply a progressive braking force, particularly at lower speeds.

Also corrects a typo in the braking logic.

Assets/Scenes/MainMap.unity

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-  m_LocalPosition: {x: 1.9644628, y: 7.0570297, z: -4.107703}
+  m_LocalRotation: {x: 0.2181528, y: 0, z: 0, w: 0.97591466}
+  m_LocalPosition: {x: 1.9644628, y: 6.2770295, z: -5.0077033}
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+      propertyPath: m_LocalPosition.y
+      value: 4
+      objectReference: {fileID: 0}
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+      propertyPath: m_LocalPosition.z
+      value: -8.5
+      objectReference: {fileID: 0}
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+      propertyPath: m_LocalRotation.w
+      value: 0.97591466
+      objectReference: {fileID: 0}
+    - target: {fileID: 3647447231556822330, guid: f80147e53b6c59543b384359e9759152, type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0.2181528
+      objectReference: {fileID: 0}
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+      propertyPath: FollowOffset.y
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+      propertyPath: FollowOffset.z
+      value: -8.5
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     m_AddedGameObjects: []