docs: update install docs to headlamp namespace (PRI-434)

- Update Helm/plugin install URLs from v0.2.4 to v1.0.0
- README: add pods/proxy RBAC scope, clarify controller is in kube-system
- docs/getting-started/*: update all download URLs to v1.0.0
- docs/deployment/helm.md: update install URLs to v1.0.0
- docs/architecture/overview.md: Headlamp Pod label → headlamp namespace
- docs/README.md: fix ArtifactHub URL
- CHANGELOG.md: add [Unreleased] entry

Note: driver/API-path references to kube-system are preserved
as they describe where the tns-csi controller workload runs,
not where Headlamp is installed.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

docs/deployment/helm.md

@@ -13,7 +13,7 @@ helm install headlamp headlamp/headlamp \
   --create-namespace \
   --set config.pluginsDir=/headlamp/plugins \
   --set pluginsManager.sources[0].name=tns-csi \
-  --set pluginsManager.sources[0].url=https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v0.2.4/tns-csi-0.2.4.tar.gz
+  --set pluginsManager.sources[0].url=https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v1.0.0/tns-csi-1.0.0.tar.gz
 ```
 
 ## Complete values.yaml Example
@@ -27,7 +27,7 @@ config:
 pluginsManager:
   sources:
     - name: tns-csi
-      url: https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v0.2.4/tns-csi-0.2.4.tar.gz
+      url: https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v1.0.0/tns-csi-1.0.0.tar.gz
 
 serviceAccount:
   name: headlamp
@@ -81,7 +81,7 @@ spec:
     pluginsManager:
       sources:
         - name: tns-csi
-          url: https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v0.2.4/tns-csi-0.2.4.tar.gz
+          url: https://github.com/privilegedescalation/headlamp-tns-csi-plugin/releases/download/v1.0.0/tns-csi-1.0.0.tar.gz
 ```
 
 ## RBAC Manifest (Apply Separately)