Ability to add plugin to default `.` zone without overriding everything

In `values.yaml` there is:
```yaml
servers:
- zones:
- zone: .
use_tcp: true
port: 53
# -- expose the service on a different port
# servicePort: 5353
# If serviceType is nodePort you can specify nodePort here
# nodePort: 30053
# hostPort: 53
plugins:
- name: errors
# Serves a /health endpoint on :8080, required for livenessProbe
- name: health
configBlock: |-
lameduck 10s
# Serves a /ready endpoint on :8181, required for readinessProbe
- name: ready
# Required to query kubernetes API for data
- name: kubernetes
parameters: cluster.local in-addr.arpa ip6.arpa
configBlock: |-
pods insecure
fallthrough in-addr.arpa ip6.arpa
ttl 30
# Serves a /metrics endpoint on :9153, required for serviceMonitor
- name: prometheus
parameters: 0.0.0.0:9153
- name: forward
parameters: . /etc/resolv.conf
- name: cache
parameters: 30
- name: loop
- name: reload
- name: loadbalance
```

I would like to just add a new plugin to this list, but without specifying this whole config for `.` zone on my end.