feat(portfolio): add ze manual page at /ze

- Add ze-manual-html ConfigMap serving ze-manual.html at /ze/index.html
- Mount ze-manual-html in nginx at /usr/share/nginx/html/ze
- Add Projects section in portfolio index with ze card linking to /ze

portfolio/deployment.yaml

@@ -21,6 +21,8 @@ spec:
           volumeMounts:
             - name: html
               mountPath: /usr/share/nginx/html
+            - name: ze-html
+              mountPath: /usr/share/nginx/html/ze
           readinessProbe:
             httpGet:
               path: /
@@ -38,3 +40,6 @@ spec:
         - name: html
           configMap:
             name: portfolio-html
+        - name: ze-html
+          configMap:
+            name: ze-manual-html