feat: add changesets to project and backfill changelog

.changeset/README.md

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+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/config.json

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+{
+    "$schema": "https://unpkg.com/@changesets/[email protected]/schema.json",
+    "changelog": ["@svitejs/changesets-changelog-github-compact", { "repo": "hey-api/openapi-ts" }],
+    "commit": false,
+    "fixed": [],
+    "linked": [],
+    "access": "public",
+    "baseBranch": "main",
+    "updateInternalDependencies": "patch",
+    "ignore": []
+}

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build
+        run: npm run build
+
+      - name: Create Release Pull Request
+        uses: changesets/action@v1
+        with:
+          version: npm run changeset version
+          publish: npm run changeset publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

CHANGELOG-old.md

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+# Changelog
+All notable changes to this project will be documented in this file.
+
+## [0.27.0] - 2024-01-15
+### Fixed
+- Reverted `@apidevtools/json-schema-ref-parser` to version 10.1.0
+
+## [0.26.0] - 2024-01-07
+### Fixed
+- Upgraded dependencies
+
+## [0.25.0] - 2023-07-05
+### Fixed
+- Upgraded dependencies
+### Added
+- Allow usage of a custom axios instance
+- Added message in generated files
+
+## [0.24.0] - 2023-04-10
+### Fixed
+- Upgraded dependencies
+- Fixed issue with Cancelable promise
+- Fixed issue with escaping reserved keywords in schema names
+### Added
+- Added `--postfixModels` option
+
+## [0.23.0] - 2022-06-02
+### Fixed
+- Upgraded dependencies
+- Added blank line at the end of generated files
+- Added support for Node.js v12
+### Added
+- Added `request` property inside `ApiError`
+- Added support for `@depricated` inside models and operations
+
+## [0.22.0] - 2022-04-26
+### Fixed
+- Upgraded dependencies
+- Fixed issue with `null` value inside comments for OpenAPI v2 enums
+- Fixed issue with compatibility for latest version of Axios (0.27.x)
+### Removed
+- Removed deprecated enum model generation
+
+## [0.21.0] - 2022-04-06
+### Fixed
+- Return `undefined` to match `noImplicitReturns` rule
+- Made `BaseHttpRequest` class abstract
+- Removed private fields using `#` inside `CancelablePromise`
+- Removed unneeded import `AbortController` from `node-fetch` client
+- Filter out wrong enum values
+
+## [0.20.1] - 2022-02-25
+### Fixed
+- Support enums with single quotes in names for V2
+
+## [0.20.0] - 2022-02-25
+### Fixed
+- Updated dependencies
+- Support enums with single quotes in names for V3
+- Generating better names when `operationId` is not given (breaking change)
+- Fixed issue where `x-enum` flags where breaking due to non-string values
+
+## [0.19.0] - 2022-02-02
+### Added
+- Support for Angular client with `--name` option
+- Added test cases for Angular client
+
+## [0.18.2] - 2022-02-02
+### Fixed
+- Updated dependencies
+- Fixed type definition
+### Added
+- Added test cases for CLI commands
+- Added test cases for query parsing
+
+## [0.18.1] - 2022-01-31
+### Fixed
+- Escaping error description
+- Made `Client.request` and `BaseHttpRequest.config` props public
+
+_## [0.18.0] - 2022-01-28
+### Added
+- Angular client generation!
+- Updated documentation with more examples and better descriptions
+
+## [0.17.0] - 2022-01-26
+### Fixed
+- Shorthand notation for properties passed through constructor
+- Simplified creation of headers
+- Prepare codebase for Angular client
+
+## [0.16.2] - 2022-01-26
+### Fixed
+- Removed dependency on `URLSearchParams` to support browser and node without any additional imports
+
+## [0.16.1] - 2022-01-26
+### Fixed
+- Correct export inside `index.ts` when giving a custom name
+
+## [0.16.0] - 2022-01-25
+### Added
+- Added option to set the indentation (spaces and tabs)
+- Added option to export separate client file that allows usage for multiple backends
+### Fixed
+- Decoupled OpenAPI object from requests
+- Updated dependencies
+
+## [0.15.0] - 2022-01-24
+### Added
+- Added change log and releases on GitHub
+
+## [0.14.0] - 2022-01-24
+### Fixed
+- Added missing `postfix` options to typedef
+- Updated escaping of comments and descriptions
+- Better handling of services without tags
+- Updated dependencies