Implement Overte Authentication and Add Test Entities

- Added documentation for Overte authentication implementation in `docs/OVERTE_AUTH.md`.
- Introduced new GLB files for cube and sphere primitives in `examples/primitives/`.
- Created a JSON file `examples/test_entities.json` containing sample entities for testing.
- Added a build and test script `scripts/build_and_test.sh` for streamlined building and verification of the project.
- Implemented a CI test runner script `scripts/ci-test.sh` to automate testing processes.
- Created a script `scripts/run_with_auth.sh` to facilitate running the Starworld client with Overte authentication.

build_and_test.sh

@@ -1,59 +0,0 @@
-#!/bin/bash
-# Quick build and test script for Starworld
-
-set -e
-
-SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
-
-echo "=== Starworld Build & Test Script ==="
-echo
-
-# 1. Build the Rust bridge
-echo "[1/3] Building Rust bridge..."
-cd "$SCRIPT_DIR/bridge"
-cargo build --release
-echo "✓ Rust bridge built successfully"
-echo
-
-# 2. Build the C++ client
-echo "[2/3] Building C++ client..."
-cd "$SCRIPT_DIR"
-mkdir -p build
-cd build
-cmake .. -DCMAKE_BUILD_TYPE=Release
-make -j$(nproc)
-echo "✓ C++ client built successfully"
-echo
-
-# 3. Verify the bridge library exists
-echo "[3/3] Verifying build artifacts..."
-BRIDGE_PATH="$SCRIPT_DIR/bridge/target/release/libstardust_bridge.so"
-if [ -f "$BRIDGE_PATH" ]; then
-    echo "✓ Bridge library found: $BRIDGE_PATH"
-    ls -lh "$BRIDGE_PATH"
-else
-    echo "✗ Bridge library not found at: $BRIDGE_PATH"
-    exit 1
-fi
-
-CLIENT_PATH="$SCRIPT_DIR/build/starworld"
-if [ -f "$CLIENT_PATH" ]; then
-    echo "✓ Client executable found: $CLIENT_PATH"
-    ls -lh "$CLIENT_PATH"
-else
-    echo "✗ Client executable not found at: $CLIENT_PATH"
-    exit 1
-fi
-
-echo
-echo "=== Build Complete! ==="
-echo
-echo "To test with simulation mode:"
-echo "  export STARWORLD_SIMULATE=1"
-echo "  export STARWORLD_BRIDGE_PATH=$SCRIPT_DIR/bridge/target/release"
-echo "  $SCRIPT_DIR/build/starworld"
-echo
-echo "To connect to an Overte server:"
-echo "  export STARWORLD_BRIDGE_PATH=$SCRIPT_DIR/bridge/target/release"
-echo "  $SCRIPT_DIR/build/starworld ws://domain.example.com:40102"
-echo