chore: update CHANGELOG for v0.1.0 (re-release)

Author: xaos-bot

CHANGELOG.md

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+## [0.1.0] - 2026-03-09 (re-release)
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+### Changed
+- chore(dc-init): update workflows and actions
+- Merge pull request #3 from XAOSTECH/anglicise/20260301-031812
+- chore: convert American spellings to British English
+- Merge pull request #2 from XAOSTECH:replace/20260228-164051
+
+chore: Replace text - automated update
+- chore: replace text across repository
+- dc-init update
+- gc-init
+- Replace Unlicense with GNU General Public License
+- Add contribution guidelines to CONTRIBUTING.md
+- Add LICENSE file for public domain dedication
+