Add sample that uses .spec.contributions instead of plugins

Signed-off-by: Angel Misevski <[email protected]>

samples/theia-next-contributions.yaml

@@ -0,0 +1,28 @@
+kind: DevWorkspace
+apiVersion: workspace.devfile.io/v1alpha2
+metadata:
+  name: theia-next
+spec:
+  started: true
+  template:
+    projects:
+      - name: web-nodejs-sample
+        git:
+          remotes:
+            origin: "https://github.com/che-samples/web-nodejs-sample.git"
+    commands:
+      - id: say-hello
+        exec:
+          component: theia-ide
+          commandLine: echo "Hello from $(pwd)"
+          workingDir: ${PROJECTS_ROOT}/project/app
+
+  contributions:
+    - name: theia
+      uri: https://che-plugin-registry-main.surge.sh/v3/plugins/eclipse/che-theia/next/devfile.yaml
+      components:
+        - name: theia-ide
+          container:
+            env:
+              - name: THEIA_HOST
+                value: 0.0.0.0