Add changelog

Author: Trevor Skaggs

CHANGELOG.md

@@ -5,6 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+### Changed
+- Changed method to POST and added body to return of `create-order` link during `search_oppurtunities` calls.
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
 
 ## [v0.5.0] - 2025-01-08