docs: Make the changelog user friendly (#13)

Author: tomasz-blasz

CHANGELOG.md

@@ -1,29 +1,38 @@
-## 0.2.1 (https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.2.0...v0.2.1) (2025-12-17)
-
-### Bug Fixes
-
-    * Align naming convention
-    * Transport v1.0.0-next.25
-
-# 0.2.0 (https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.1.0...v0.2.0) (2025-12-16)
-
-### Features
-
-    * Accessibility API
-    * Advertising API
-    * Device API
-    * Display API
-    * Lifecycle 2.0 API
-    * Localization API
-    * Presentation API
-    * Stats API
-    * Remove not agreed APIs
-    * Thunder removal
-    * Change initialization of the transport
-    * Transport v1.0.0-next.23
-
-# 0.1.0 (https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.0.1...v0.1.0) (2025-12-16)
-
-### Features
-
-    * Firebolt C++ Client
+## [Unreleased](https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.2.1...main)
+
+## [0.2.1](https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.2.0...v0.2.1) (2025-12-17)
+
+### Changed
+- Updated Firebolt C++ Transport dependency to `v1.0.0-next.25`
+
+## [0.2.0](https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.1.0...v0.2.0) (2025-12-16)
+
+### Added
+- New APIs
+  - Accessibility
+  - Advertising
+  - Device
+  - Display
+  - Lifecycle 2.0
+  - Localization
+  - Presentation
+  - Stats
+
+### Changed
+- **Breaking**: Header files have been moved to a `firebolt/` subdirectory. Include paths must be updated (e.g., `#include <firebolt/firebolt.h>`)
+- **Breaking**: The client initialization and deinitialization flow has been updated
+- The dependency on the Thunder framework has been removed
+- Updated Firebolt C++ Transport dependency to `v1.0.0-next.23`
+
+### Removed
+- The following APIs, which were not part of the formal specification, have been removed:
+  - ClosedCaptions
+  - HdmiInput
+  - Lifecycle 1.0
+  - Metrics
+  - SecureStorage
+
+## [0.1.0](https://github.com/rdkcentral/firebolt-cpp-client/compare/v0.0.1...v0.1.0) (2025-12-16)
+
+### Added
+- Initial Firebolt C++ Client