Format all files with prettier VSCode plugin and add yamllint in CI (#413)

@justusbunsi to end my formatting mess... ;)

I am not fully sure myself about the linebreaks in `values.yaml` but I don't think there's an easy way to change that behavior.

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/413
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>

values.yaml

@@ -138,7 +138,8 @@ ingress:
   enabled: false
   # className: nginx
   className:
-  annotations: {}
+  annotations:
+    {}
     # kubernetes.io/ingress.class: nginx
     # kubernetes.io/tls-acme: "true"
   hosts:
@@ -157,7 +158,8 @@ ingress:
 ## @section StatefulSet
 #
 ## @param resources Kubernetes resources
-resources: {}
+resources:
+  {}
   # We usually recommend not to specify default resources and to leave this as a conscious
   # choice for the user. This also increases chances charts run on environments with little
   # resources, such as Minikube. If you do want to specify resources, uncomment the following
@@ -192,7 +194,8 @@ dnsConfig: {}
 ## @param statefulset.labels Labels for the statefulset
 ## @param statefulset.annotations Annotations for the Gitea StatefulSet to be created
 statefulset:
-  env: []
+  env:
+    []
     # - name: VARIABLE
     #   value: my-value
   terminationGracePeriodSeconds: 60
@@ -277,7 +280,7 @@ gitea:
   ## @param gitea.admin.password Password for the Gitea admin user
   ## @param gitea.admin.email Email for the Gitea admin user
   admin:
-    #existingSecret: gitea-admin-secret
+    # existingSecret: gitea-admin-secret
     existingSecret:
     username: gitea_admin
     password: r8sA8CPHD9!bt6d
@@ -293,7 +296,8 @@ gitea:
       #    prometheus-release: prom1
 
   ## @param gitea.ldap LDAP configuration
-  ldap: []
+  ldap:
+    []
     # - name: "LDAP 1"
     #  existingSecret:
     #  securityProtocol:
@@ -310,7 +314,8 @@ gitea:
 
   # Either specify inline `key` and `secret` or refer to them via `existingSecret`
   ## @param gitea.oauth OAuth configuration
-  oauth: []
+  oauth:
+    []
     # - name: 'OAuth 1'
     #   provider:
     #   key: