updates to core architecture diagrams leveraging plantuml, removed usage of virtual machine language in docs to help avoid confusion

docs/diagrams/architecture.plantuml

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+@startuml
+skinparam {    
+    RoundCorner 8
+    ComponentStyle uml2
+    ComponentBorderColor #Black
+    InterfaceBorderColor #Black
+    InterfaceBackgroundColor #Yellow
+}
+
+package User {
+    component "core-gui" as gui #DeepSkyBlue
+    component "coresendmsg" #DeepSkyBlue
+    component "python scripts" as scripts #DeepSkyBlue
+    component vcmd #DeepSkyBlue
+}
+package Server {
+    component "core-daemon" as daemon #DarkSeaGreen
+}
+package Python {
+    component core #LightSteelBlue
+}
+package "Linux System" {    
+    component nodes #SpringGreen [
+        nodes
+        (linux namespaces)
+    ]    
+    component links #SpringGreen [
+        links
+        (bridging and traffic manipulation)
+    ]
+}
+
+package API {
+    interface TLV as tlv
+    interface gRPC as grpc
+}
+
+gui <..> tlv
+coresendmsg <..> tlv
+scripts <..> tlv
+scripts <..> grpc
+tlv -- daemon
+grpc -- daemon
+scripts -- core
+daemon - core
+core <..> nodes
+core <..> links
+vcmd <..> nodes
+@enduml

docs/diagrams/workflow.plantuml

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+@startuml
+skinparam {    
+    RoundCorner 8
+    StateBorderColor #Black
+    StateBackgroundColor #LightSteelBlue
+}
+
+Definition: Session XML/IMN
+Definition: GUI Drawing
+Definition: Scripts
+
+Configuration: Configure Hooks
+Configuration: Configure Services
+Configuration: Configure WLAN / Mobility
+Configuration: Configure EMANE
+
+Instantiation: Create Nodes
+Instantiation: Create Interfaces
+Instantiation: Create Bridges
+Instantiation: Start Services
+
+Runtime: Interactive Shells
+Runtime: Traffic Scripts
+Runtime: Mobility
+Runtime: Widgets
+
+Datacollect: Collect Files
+Datacollect: Other Results
+
+Shutdown: Shutdown Services
+Shutdown: Destroy Brdges
+Shutdown: Destroy Interfaces
+Shutdown: Destroy Nodes
+
+Definition -> Configuration
+Configuration -> Instantiation
+Instantiation -> Runtime
+Runtime -> Datacollect
+Datacollect -> Shutdown
+@enduml