add namesh package and samples

ProjectSettings/NavMeshAreas.asset

@@ -71,7 +71,7 @@ NavMeshProjectSettings:
     cost: 1
   m_LastAgentTypeID: -887442657
   m_Settings:
-  - serializedVersion: 2
+  - serializedVersion: 3
     agentTypeID: 0
     agentRadius: 0.5
     agentHeight: 2
@@ -84,8 +84,48 @@ NavMeshProjectSettings:
     cellSize: 0.16666667
     manualTileSize: 0
     tileSize: 256
-    accuratePlacement: 0
+    buildHeightMesh: 0
+    maxJobWorkers: 0
+    preserveTilesOutsideBounds: 0
+    debug:
+      m_Flags: 0
+  - serializedVersion: 3
+    agentTypeID: 1
+    agentRadius: 0.5
+    agentHeight: 2
+    agentSlope: 45
+    agentClimb: 0.75
+    ledgeDropHeight: 0
+    maxJumpAcrossDistance: 0
+    minRegionArea: 2
+    manualCellSize: 0
+    cellSize: 0.16666667
+    manualTileSize: 0
+    tileSize: 256
+    buildHeightMesh: 0
+    maxJobWorkers: 0
+    preserveTilesOutsideBounds: 0
+    debug:
+      m_Flags: 0
+  - serializedVersion: 3
+    agentTypeID: 2
+    agentRadius: 1
+    agentHeight: 2
+    agentSlope: 36
+    agentClimb: 0.4
+    ledgeDropHeight: 0
+    maxJumpAcrossDistance: 0
+    minRegionArea: 2
+    manualCellSize: 0
+    cellSize: 0.16666667
+    manualTileSize: 0
+    tileSize: 256
+    buildHeightMesh: 0
+    maxJobWorkers: 0
+    preserveTilesOutsideBounds: 0
     debug:
       m_Flags: 0
   m_SettingNames:
   - Humanoid
+  - Humanoid for Navigation Sample
+  - Ogre for Navigation Sample