docs: [Tutorial] Deploy an Edge Cluster on VirtualBox (#3561)

* docs: add diagram

* docs: add prereqs, starter code, arguments sections

* docs: add screenshots and output of commands

* docs: update webp references and images

* docs: add more screenshots, final touches

* docs: convert images to webp

* docs: fix webp image references

* docs: final touches

* docs: fix gitleaks issue

* docs: apply suggestions from review

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* docs: update and test canvos 4.4.8 and final touches

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Apply suggestions from code review

Co-authored-by: Adelina Simion <43963729+addetz@users.noreply.github.com>

* ci: auto-formatting prettier issues

* docs: apply suggestions from review

* docs: feedback, update canvos tag, screenshots, final touches

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

* Optimised images with calibre/image-actions

---------

Co-authored-by: vault-token-factory-spectrocloud[bot] <133815545+vault-token-factory-spectrocloud[bot]@users.noreply.github.com>
Co-authored-by: Adelina Simion <43963729+addetz@users.noreply.github.com>
Co-authored-by: caroldelwing <caroldelwing@users.noreply.github.com>
(cherry picked from commit 58bd446)

.gitleaksignore

@@ -114,3 +114,4 @@ e4040084011d4d7935a589959b96ebc5cfba7a94:docs/docs-content/integrations/kubernet
 969ac609f82bacb36093c429adfc096c5a97e10f:docs/docs-content/tutorials/cluster-deployment/pde/deploy-app.md:generic-api-key:1195
 969ac609f82bacb36093c429adfc096c5a97e10f:docs/docs-content/tutorials/cluster-deployment/pde/deploy-app.md:generic-api-key:1232
 969ac609f82bacb36093c429adfc096c5a97e10f:docs/docs-content/tutorials/edge/deploy-cluster.md:generic-api-key:240
+8f515d46ce2bb80b7173bf9684ed8e87cb96fd83:docs/docs-content/tutorials/edge/deploy-cluster-virtualbox.md:generic-api-key:229