chore: Migrate to yarn v4

.devfile.yaml

@@ -39,3 +39,14 @@ commands:
         --output-file:/tmp/devworkspace-che-code-latest.yaml \
         --injectDefaultComponent:true \
         --defaultComponentImage:registry.access.redhat.com/ubi8/openjdk-11:latest
+  - id: instll-yarn4
+    exec:
+      label: "4. Install yarn v4"
+      component: builder
+      workingDir: ${PROJECTS_ROOT}/devworkspace-generator
+      commandLine: |
+        corepack enable
+        echo -e "Y" | yarn --version
+events:
+  postStart:
+    - instll-yarn4

.github/workflows/pr-checks.yml

@@ -25,7 +25,9 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
       - name: Check dependencies usage restrictions
-        run: docker run --rm -t -v ${PWD}/:/workspace/project quay.io/che-incubator/dash-licenses:next --check
+        run: |
+          corepack enable
+          docker run --rm -t -v ${PWD}/:/workspace/project quay.io/che-incubator/dash-licenses:next --check
 
   unit-tests:
     runs-on: ubuntu-22.04

.yarnrc.yml

@@ -0,0 +1 @@
+nodeLinker: node-modules

package.json

@@ -1,12 +1,9 @@
 {
   "name": "@eclipse-che/che-devworkspace-generator",
   "version": "7.114.0-next",
-  "private": false,
   "description": "Generates DevWorkspaces by transforming existing devfiles",
   "main": "lib/entrypoint.js",
-  "bin": {
-    "che-devworkspace-generator": "lib/entrypoint.js"
-  },
+  "bin": "lib/entrypoint.js",
   "publishConfig": {
     "access": "public"
   },
@@ -99,5 +96,5 @@
     ],
     "preset": "ts-jest"
   },
-  "packageManager": "yarn@1.22.22"
+  "packageManager": "yarn@4.12.0"
 }