build(npm): add and configure semantic-release

Co-authored-by: barth
Co-authored-by: sendler

package.json

+{
+  "name": "sade",
+  "description": "SADE ( Scalable Architecture for Digital Editions) it an application for [eXist-db](https://exist-db.org) that offers a set of useful features to quickly build a website for digital editions basing on [TEI](http://www.tei-c.org)-encoded texts.",
+  "repository": {
+    "type": "git",
+    "url": "git@gitlab.gwdg.de:SADE/SADE.git"
+  },
+  "private": true,
+  "devDependencies": {
+    "@semantic-release/changelog": "^5.0.1",
+    "@semantic-release/exec": "^5.0.0",
+    "@semantic-release/git": "^9.0.0",
+    "@semantic-release/gitlab-config": "^8.0.0",
+    "commitizen": "^4.2.2",
+    "cz-conventional-changelog": "^3.3.0",
+    "semantic-release": "^17.2.2"
+  },
+  "release": {
+    "branches": [
+      "main"
+    ],
+    "plugins": [
+      "@semantic-release/commit-analyzer",
+      "@semantic-release/release-notes-generator",
+      [
+        "@semantic-release/changelog",
+        {
+          "changelogFile": "CHANGELOG.md"
+        }
+      ],
+      [
+        "@semantic-release/gitlab",
+        {
+          "gitlabUrl": "https://gitlab.gwdg.de",
+          "assets": [
+            {
+              "path": ".build/sade-*.xar",
+              "label": "XML Archive File"
+            },
+            {
+              "path": "CHANGELOG.md",
+              "label": "Changelog"
+            }
+          ]
+        }
+      ],
+      [
+        "@semantic-release/git",
+        {
+          "assets": [
+            "CHANGELOG.md"
+          ]
+        }
+      ],
+      [
+        "@semantic-release/exec",
+        {
+          "prepareCmd": "./prepare ${nextRelease.version}",
+          "publishCmd": "./publish .build/sade-${nextRelease.version}.xar"
+        }
+      ]
+    ]
+  }
+}