docs(release): add changelog for v1.0.0

Author: 10xdev4u-alt

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [1.0.0] - 2026-04-07
+
+### Added
+- **Phase 1: Foundation** - Core infrastructure, ROS2 workspace, Docker environment, and HAL.
+- **Phase 2: Perception** - LiDAR/Camera/IMU drivers, YOLOv8 detection, and Semantic Segmentation.
+- **Phase 3: SLAM** - Visual/LiDAR Odometry, Pose Graph Optimization, and Octomap integration.
+- **Phase 4: Planning** - Hybrid A*, DRL local planners, and Social-aware navigation.
+- **Phase 5: Control** - Motor interfaces, EKF state estimation, and safety controllers.
+- **Phase 6: UI/UX** - Three.js 3D dashboard, WebRTC live streaming, and Mobile UI.
+- **Phase 7: Cloud** - Fleet management, OTA updates, and Edge-Cloud orchestration.
+- **Phase 8: Polish** - Performance optimizations, full API docs, and deployment guides.
+
+### Fixed
+- Memory leaks in perception pipelines.
+- Navigation recovery behavior edge cases.