Initial commit: AIGame Unity client with URP, HybridCLR, YooAsset and tooling.

Co-authored-by: Cursor <cursoragent@cursor.com>

AIClient/Packages/com.unity.pipeline/Documentation~/commands/navigation.md

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+# Navigation & selection commands
+
+Commands to read and drive the Editor selection, and to run Unity Search queries. All commands are read-only or non-destructive and run on the main thread.
+
+### `get_selection`
+Read the current Editor selection as structured object identities.
+
+No parameters.
+
+**Returns:** `SelectionResult`
+
+### `set_selection`
+Set the Editor selection to the given assets/scene objects.
+
+| Parameter | Required | Default | Description |
+|-----------|----------|---------|-------------|
+| `instance_ids` | no | `–` | Scene/loaded object instance IDs to select. |
+| `paths` | no | `–` | Asset paths to select (e.g. Assets/Foo.prefab). |
+
+**Returns:** `SelectionResult`
+
+### `search`
+Run a Unity Search query and return structured results.
+
+| Parameter | Required | Default | Description |
+|-----------|----------|---------|-------------|
+| `query` | yes | `–` | Unity Search query string, e.g. 't:Material', 'p: my asset', 'h: Main Camera'. |
+| `limit` | no | `50` | Max results to return (capped 200). |
+
+**Returns:** `SearchResult`
+
+See [Creating commands](../creating-commands.md) and [Connectivity](../connectivity.md).