Add homepage attributes

packages/app-shell/package.json

 {
   "name": "@dbp-toolkit/app-shell",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/app-shell",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/auth/package.json

 {
   "name": "@dbp-toolkit/auth",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/auth",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/check-in-place-select/package.json

 {
   "name": "@dbp-toolkit/check-in-place-select",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/check-in-place-select",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/common/package.json

 {
   "name": "@dbp-toolkit/common",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/common",
   "version": "0.1.0",
   "module": "index.js",
   "license": "LGPL-2.1-or-later",

packages/data-table-view/package.json

 {
   "name": "@dbp-toolkit/data-table-view",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/data-table-view",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/file-handling/package.json

 {
   "name": "@dbp-toolkit/file-handling",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/file-handling",
   "version": "0.1.5",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/knowledge-base-web-page-element-view/package.json

 {
   "name": "@dbp-toolkit/knowledge-base-web-page-element-view",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/knowledge-base-web-page-element-view",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/language-select/package.json

 {
   "name": "@dbp-toolkit/language-select",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/language-select",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/matomo/package.json

 {
   "name": "@dbp-toolkit/matomo",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/matomo",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/notification/package.json

 {
   "name": "@dbp-toolkit/notification",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/notification",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/person-profile/package.json

 {
   "name": "@dbp-toolkit/person-profile",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/person-profile",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/person-select/package.json

 {
   "name": "@dbp-toolkit/person-select",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/person-select",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",

packages/qr-code-scanner/package.json

 {
   "name": "@dbp-toolkit/qr-code-scanner",
+  "homepage": "https://gitlab.tugraz.at/dbp/web-components/toolkit/-/tree/master/packages/qr-code-scanner",
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",