Add initial CHANGELOG

[skip ci]

Signed-off-by: Jason Frey <fryguy9@gmail.com>

Author: Fryguy

CHANGELOG.md

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+# Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased]
+
+## [1.0.2] - 2024-12-16
+### Added
+* Add macos-15 runner [[#9](https://github.com/IBM/actions-ibmcloud-cli/pull/9)]
+
+### Changed
+* Refactor run method into functions [[#12](https://github.com/IBM/actions-ibmcloud-cli/pull/12)]
+* Update packages to latest [[#13](https://github.com/IBM/actions-ibmcloud-cli/pull/13)]
+
+### Removed
+* Remove macos-12 runner [[#9](https://github.com/IBM/actions-ibmcloud-cli/pull/9)]
+
+## [1.0.1] - 2024-09-26
+### Fixed
+* Fix issue where version format changed in ibmcloud cli [[#8](https://github.com/IBM/actions-ibmcloud-cli/pull/8)]
+
+## [1.0.0] - 2024-06-17
+* **BREAKING**: Revamp as a Javascript based GitHub Action [[#2](https://github.com/IBM/actions-ibmcloud-cli/pull/2)], [[#3](https://github.com/IBM/actions-ibmcloud-cli/pull/3)], [[#4](https://github.com/IBM/actions-ibmcloud-cli/pull/4)], [[#5](https://github.com/IBM/actions-ibmcloud-cli/pull/5)], [[#6](https://github.com/IBM/actions-ibmcloud-cli/pull/6)]
+
+[Unreleased]: https://github.com/IBM/actions-ibmcloud-cli/compare/v1.0.2...HEAD
+[1.0.2]: https://github.com/IBM/actions-ibmcloud-cli/compare/v1.0.1...v1.0.2
+[1.0.1]: https://github.com/IBM/actions-ibmcloud-cli/compare/v1.0.0...v1.0.1
+[1.0.0]: https://github.com/IBM/actions-ibmcloud-cli/compare/v0.0.8...v1.0.0