docs: update changelog for Raw framework

Author: benajaero

CHANGELOG.md

@@ -3,6 +3,8 @@
 All notable changes to this project will be documented in this file.
 
 ## Unreleased
-- Add configuration support for bind address, thread count, and document root.
-- Add minimal HTTP request parsing and static file routing.
-- Add CI workflow for formatting, linting, and tests.
+- Introduce the Raw framework core with async routing and middleware.
+- Add static file middleware, request ID, and logging helpers.
+- Provide request helpers for JSON parsing and response helpers for JSON/HTML/text.
+- Add the Raw CLI with project scaffolding.
+- Expand docs and examples for the new framework.