Add llamanager plugin (#171)

* feat: add Llamanager plugin

* fix image paths in README

* docs: fix validation issues

* fix: handle missing trailing separator in modelfile directory

* fix: escape user input in shell commands

* fix: disable modelfile editor when path is unset or misconfigured

* fix: handle invalid Modelfile directory

* docs: update README

* fix: reload launcher model from config

* docs: update demo assets

llamanager/translations/en.json

@@ -0,0 +1,12 @@
+{
+  "settings": {
+    "modelfile_path": {
+      "label": "Modelfile Path",
+      "description": "The directory where all your modelfiles are stored."
+        },
+    "launcher": {
+        "label": "Launcher",
+        "description": "Preferred AI model when using /ll in the launcher."
+        }
+    }
+}