ci: add Release Please automation for changelog and version management

.github/release-please-config.json

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+{
+	"$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+	"changelog-sections": [
+		{ "type": "feat", "section": "Features" },
+		{ "type": "fix", "section": "Bug Fixes" },
+		{ "type": "perf", "section": "Performance Improvements" },
+		{ "type": "refactor", "section": "Code Refactoring" },
+		{ "type": "docs", "section": "Documentation" },
+		{ "type": "ci", "section": "Continuous Integration" },
+		{ "type": "build", "section": "Build System" },
+		{ "type": "chore", "section": "Miscellaneous" },
+		{ "type": "style", "section": "Styles", "hidden": true },
+		{ "type": "test", "section": "Tests", "hidden": true }
+	],
+	"bump-minor-pre-major": true,
+	"always-update": true,
+	"bump-patch-for-minor-pre-major": true,
+	"include-v-in-tag": true,
+	"include-component-in-tag": false,
+	"plugins": ["sentence-case"],
+	"packages": {
+		".": {
+			"release-type": "rust",
+			"exclude-paths": [".vscode", "docs"],
+			"extra-files": [
+				{
+					"type": "toml",
+					"path": "Cargo.lock",
+					"jsonpath": "$.package[?(@.name=='banner')].version"
+				}
+			]
+		}
+	}
+}

.github/release-please-manifest.json

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+{
+	".": "0.6.0"
+}

.github/workflows/release.yml

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+name: Release Please
+
+on:
+  workflow_dispatch:
+
+  workflow_run:
+    workflows: ["CI"]
+    types:
+      - completed
+    branches:
+      - master
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    name: Create Release PR
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - uses: googleapis/release-please-action@v4
+        with:
+          token: ${{ secrets.RELEASE_PLEASE_TOKEN }}
+          config-file: .github/release-please-config.json
+          manifest-file: .github/release-please-manifest.json