chore(core): refactor to make all unit tests pass (#6)

_This is the first time I ever messed with helm and is an experiment to show what prevents the tests to pass and how far it still depends on the gitea chart_
### Description of the change

- Deletes a single test that seems to depend directly on gitea
- make all tests pass
- Moves all value accesses from `actions` one level up
- Copies content of the gitea chart required by the existing test
  - Reveals all dependencies that needs to be decoupled
- Fixes readme generation
  - add package.json
  - copy dependent readme section from helm-gitea
- Removes all dependencies
- giteaRootURL is now required to be provided
  - consistency check that this value has been provided
  - added test for consistency failure
- nc command no longer uses an hardcoded dns name and is checked in tests
  - added test
- Copied yamllint from helm-gitea
  - added pnpm lock file exclusion
- Installed pnpm in the workflow
- Updated make unittest command in CI to unittest-helm
### Benefits

The existing tests are passing

### Possible drawbacks

The provision job might still not work.

### Applicable issues

- Fixes #5

### Additional information

The following usage should now deploy
```yaml
existingSecret: "somesecret"
existingSecretKey: "key"

## Specify the root URL of the Gitea instance
giteaRootURL: "http://somedomain:3000"
```
### ⚠ BREAKING

- giteaRootURL is now required to be provided
- Moves all value accesses from `actions` one level up
  - The values.yml had this change without updating tests / dev Readme

Reviewed-on: https://gitea.com/gitea/helm-actions/pulls/6
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.com>
Reviewed-by: volker.raschek <markus.pesch@web.de>
Co-authored-by: Christopher Homberger <christopher.homberger@web.de>
Co-committed-by: Christopher Homberger <christopher.homberger@web.de>

values.yaml

@@ -2,6 +2,7 @@
 # - must enable persistence if the job is enabled
 ## @section Gitea Actions
 #
+## @param enabled Create an act runner StatefulSet.
 ## @param init.image.repository The image used for the init containers
 ## @param init.image.tag The image tag used for the init containers
 ## @param statefulset.annotations Act runner annotations
@@ -34,6 +35,7 @@
 ## @param provisioning.publish.pullPolicy The publish image pullPolicy that can create the secret
 ## @param existingSecret Secret that contains the token
 ## @param existingSecretKey Secret key
+## @param giteaRootURL URL the act_runner registers and connect with
 enabled: false
 statefulset:
   annotations: {}
@@ -97,3 +99,60 @@ provisioning:
 ##
 existingSecret: ""
 existingSecretKey: ""
+
+## Specify the root URL of the Gitea instance
+giteaRootURL: ""
+
+## @section Persistence
+#
+## @param persistence.enabled Enable persistent storage
+## @param persistence.create Whether to create the persistentVolumeClaim for shared storage
+## @param persistence.mount Whether the persistentVolumeClaim should be mounted (even if not created)
+## @param persistence.claimName Use an existing claim to store repository information
+## @param persistence.size Size for persistence to store repo information
+## @param persistence.accessModes AccessMode for persistence
+## @param persistence.labels Labels for the persistence volume claim to be created
+## @param persistence.annotations.helm.sh/resource-policy Resource policy for the persistence volume claim
+## @param persistence.storageClass Name of the storage class to use
+## @param persistence.subPath Subdirectory of the volume to mount at
+## @param persistence.volumeName Name of persistent volume in PVC
+persistence:
+  enabled: true
+  create: true
+  mount: true
+  claimName: gitea-shared-storage
+  size: 10Gi
+  accessModes:
+    - ReadWriteOnce
+  labels: {}
+  storageClass:
+  subPath:
+  volumeName: ""
+  annotations:
+    helm.sh/resource-policy: keep
+
+## @section Image
+## @param image.registry image registry, e.g. gcr.io,docker.io
+## @param image.repository Image to start for this pod
+## @param image.tag Visit: [Image tag](https://hub.docker.com/r/gitea/gitea/tags?page=1&ordering=last_updated). Defaults to `appVersion` within Chart.yaml.
+## @param image.digest Image digest. Allows to pin the given image tag. Useful for having control over mutable tags like `latest`
+## @param image.pullPolicy Image pull policy
+## @param image.rootless Wether or not to pull the rootless version of Gitea, only works on Gitea 1.14.x or higher
+## @param image.fullOverride Completely overrides the image registry, path/image, tag and digest. **Adjust `image.rootless` accordingly and review [Rootless defaults](#rootless-defaults).**
+image:
+  registry: "docker.gitea.com"
+  repository: gitea
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: ""
+  digest: ""
+  pullPolicy: IfNotPresent
+  rootless: true
+  fullOverride: ""
+
+## @section Global
+#
+## @param global.imageRegistry global image registry override
+## @param global.storageClass global storage class override
+global:
+  imageRegistry: ""
+  storageClass: ""