🔧(helm) adapt helm chart

Done:
- Rename all occurrences of "impress" to "meet".
- Update Agent Connect secrets credentials for the dev environment.
- Add new development secrets for LiveKit.
- Remove Minio from the dev stack (no cold storage required).
- Add LiveKit chart to the stack.
- Remove templates and values related to the WebSocket server.

The integration of LiveKit was inspired by an example from the "numerique-gouve/infrastructure" repo.
However, a notable issue persists with LiveKit's default chart: we are unable to override
the namespace, resulting in all LiveKit components running in the default namespace.

thx to @rouja for his help.

src/helm/extra/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
 name: extra
-description: A Helm chart to add some manifests to impress
+description: A Helm chart to add some manifests to meet
 type: application
 version: 0.1.0

src/helm/extra/templates/postgresql.yaml

@@ -4,4 +4,4 @@ metadata:
   name: postgresql
   namespace: {{ .Release.Namespace | quote }}
 spec:
-  database: impress
+  database: meet

src/helm/extra/templates/s3.yaml

@@ -1,8 +0,0 @@
-apiVersion: core.libre.sh/v1alpha1
-kind: Bucket
-metadata:
-  name: impress-media-storage
-  namespace: {{ .Release.Namespace | quote }}
-spec:
-  provider: data
-  versioned: true