chore(arch): projectmgmt likec4 model separated from arch models by projects

ref: https://likec4.dev/dsl/projects/#_top

docs/technical-documentation/project/conceptual-onboarding/7_conclusio/likec4.config.json

@@ -0,0 +1,3 @@
+{
+  "name": "project-management"
+}

likec4/likec4.config.json

@@ -0,0 +1,3 @@
+{
+  "name": "architecture"
+}