chore(release): prepare for stable release 1.0.0 (#16)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [1.0.0] - 2025-09-08
+
+### 🚀 Features
+
+- *(ci)* Improve release process (#14) - ([4e8a00d](https://github.com/equinor/radix-buildkit-builder/commit/4e8a00de8bc559ff821c09ae276ff7142afb4e22)) by @nilsgstrabo in [#14](https://github.com/equinor/radix-buildkit-builder/pull/14)
+
+- Add one default registry (docker.io) (#7) - ([b49711f](https://github.com/equinor/radix-buildkit-builder/commit/b49711f3e0092f9f6e18eb5999324ebc1deca3ce)) by @Richard87 in [#7](https://github.com/equinor/radix-buildkit-builder/pull/7)
+
+
+## New Contributors ❤️
+
+* @nilsgstrabo made their first contribution in [#14](https://github.com/equinor/radix-buildkit-builder/pull/14)
+* @satr made their first contribution in [#10](https://github.com/equinor/radix-buildkit-builder/pull/10)
+* @Richard87 made their first contribution in [#7](https://github.com/equinor/radix-buildkit-builder/pull/7)
+<!-- generated by git-cliff -->

version.txt

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+1.0.0