feat(changelog): add changelog

.changes/header.tpl.md

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+# Changelog
+All notable changes to this project will be documented in this file.

.changes/unreleased/Added-20250401-003545.yaml

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+kind: Added
+body: Added `emit_classes` config option that, if enabled, puts all the queries into classes
+time: 2025-04-01T00:35:45.5676193+02:00
+custom:
+    Author: rayakame
+    PR: "13"

.changes/unreleased/Added-20250401-004659.yaml

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+kind: Added
+body: Added changelog functionality
+time: 2025-04-01T00:46:59.2722211+02:00
+custom:
+    Author: rayakame
+    PR: "14"

.changie.yaml

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+changesDir: .changes
+unreleasedDir: unreleased
+headerPath: header.tpl.md
+changelogPath: CHANGELOG.md
+versionExt: md
+versionFormat: '## {{.Version}} - {{.Time.Format "2006-01-02"}}'
+kindFormat: '### {{.Kind}}'
+changeFormat: '* [#{{.Custom.PR}}](https://github.com/rayakame/sqlc-gen-better-python/pull/{{.Custom.PR}}) {{.Body}} ({{.Custom.Author}})'
+custom:
+  - key: PR
+    type: int
+    minInt: 1
+  - key: Author
+    label: GitHub Name
+    type: string
+    minLength: 3
+kinds:
+    - label: Added
+      auto: minor
+    - label: Changed
+      auto: major
+    - label: Deprecated
+      auto: minor
+    - label: Removed
+      auto: major
+    - label: Fixed
+      auto: patch
+    - label: Security
+      auto: patch
+newlines:
+    afterChangelogHeader: 1
+    beforeChangelogVersion: 1
+    endOfVersion: 1
+envPrefix: CHANGIE_

.github/workflows/fragments-check.yml

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+name: Fragments check
+
+on:
+  pull_request:
+    types: [labeled, unlabeled, opened, reopened, synchronize]
+    branches:
+      - main
+
+jobs:
+  check-fragment-added:
+    if: github.event.pull_request.user.type != 'Bot' && !contains(github.event.pull_request.labels.*.name, 'skip-fragment-check')
+    runs-on: ubuntu-latest
+
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: '0'
+
+      - name: Check if linked to the correct pull request
+        run: |
+          diff=$(git diff origin/${{ github.base_ref }} HEAD --name-only)
+          changelog_fragments=$(echo "$diff" | grep "^.changes/unreleased/.*\.yaml$")
+          pr_number=${{ github.event.pull_request.number }}
+          found_match=false
+
+          for file in $changelog_fragments; do
+            if grep -qE "PR: *\"?$pr_number\"?" "$file"; then
+              echo "✅ Found PR number $pr_number in $file"
+              found_match=true
+            fi
+          done
+
+          if [ "$found_match" = false ]; then
+            echo "❌ No matching PR number found in changelog fragments."
+            exit 1
+          fi
+
+

.github/workflows/prepare_release.yml

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+name: Prepare Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'The version to prepare the release for'
+        required: true
+        type: choice
+        options:
+          - major
+          - minor
+          - patch
+
+jobs:
+  generate-pr:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/master'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Batch changes
+        uses: miniscruff/changie-action@v2
+        with:
+          version: latest
+          args: batch ${{ github.event.inputs.version }}
+
+      - name: Merge changes
+        uses: miniscruff/changie-action@v2
+        with:
+          version: latest
+          args: merge
+
+      - name: Get the latest version
+        id: latest
+        uses: miniscruff/changie-action@v2
+        with:
+          version: latest
+          args: latest
+
+      - name: Set version
+        run: |
+          sed -i 's/^const PluginVersion = ".*"/const PluginVersion = "'"${{ steps.latest.outputs.output }}"'"/' internal/core/config.go
+
+          echo "✅ Updated PluginVersion to $new_version"
+
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v4
+        with:
+          title: Release ${{ steps.latest.outputs.output }}
+          branch: release/${{ steps.latest.outputs.output }}
+          commit-message: Release ${{ steps.latest.outputs.output }}