Pull/Switch Model Commands Fix (#137)

* Update: Channel checker and channel name gone

* Add: note of where problem can be

* Update: Check if model already exists for Pull Command

* Add: User/Admin Command Constants

* Update: version increment

package.json

@@ -1,6 +1,6 @@
 {
   "name": "discord-ollama",
-  "version": "0.7.1",
+  "version": "0.7.2",
   "description": "Ollama Integration into discord",
   "main": "build/index.js",
   "exports": "./build/index.js",