vboxmanage-*: add page (#11598)

* VBoxManage-unregistervm : create & write markdown

* VBoxManage-clonevm : create & write markdown

* VBoxManage-createvm : create & write markdown

* VBoxManage-export : create & write markdown

* VBoxManage-import : create & write markdown

* VBoxManage-registervm : create & write markdown

* VBoxManage-registervm : add Title

* VBoxManage-unregistervm : add Title

* vboxmamange : correct typo

* Update pages/common/vboxmanage-clonevm.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* vboxmamange-* : rewrite to infinitive tense + change name exemple

* vboxmamange-* : change name exemple

* vboxmamange-* : add colon + add empty line

* Update pages/common/vboxmanage-import.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* Update pages/common/vboxmanage-import.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* Update pages/common/vboxmanage-import.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* Update pages/common/vboxmanage-import.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* Update pages/common/vboxmanage-import.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* vboxmanage-createvm : fix typo

* vboxmanage-export/import/clonevm : fix typo

* Update pages/common/vboxmanage-clonevm.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

* vboxmanage-registervm/createVM/cloneVM : correct password option error + correct typo

* VBoxManage-export : correct page

* vboxmanage-createvm : correct typo ostype

* vboxmanage-* : fix typo

* Update vboxmanage-registervm.md

---------

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/common/vboxmanage-export.md

@@ -0,0 +1,24 @@
+# vboxmanage-export
+
+> Export virtual machines to a virtual appliance (ISO) or a cloud service.
+> More information: <https://www.virtualbox.org/manual/ch08.html#vboxmanage-export>.
+
+- Specify the target OVF file:
+
+`VBoxManage export --output {{path/to/filename.ova}}`
+
+- Export in OVF 0.9 legacy mode:
+
+`VBoxManage export --legacy09`
+
+- Export in OVF (0.9|1.0|2.0) format:
+
+`VBoxManage export --{{ovf09|ovf10|ovf20}}`
+
+- Create manifest of the exported files:
+
+`VBoxManage export --manifest`
+
+- Specify description to the VM:
+
+`VBoxManage export --description "{{description-info}}"`