Extracted the external tool base for python runner

Fixed URL building in APITool.java.
Updated libraries for API, Launcher.
Started applying NotNull annotation to methods and arguments in Core.java.
Started handeling the big init block in Core.java.
Added overloaded constructor for Core.java and made Core.ollamaIP a variabled that's definible
Updated Tool.addTool return for 400 error.

API/src/main/java/me/zacharias/chat/api/APITool.java

@@ -65,7 +65,7 @@ public class APITool extends OllamaFunctionTool {
 
     @Override
     public OllamaToolRespnce function(OllamaFunctionArgument... args) {
-        UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(requestUrl);
+        UriComponentsBuilder builder = UriComponentsBuilder.fromUriString(requestUrl);
         for (OllamaFunctionArgument arg : args) {
             builder.queryParam(arg.argument(), arg.value());
         }

API/src/main/java/me/zacharias/chat/api/controllers/Tool.java

@@ -34,7 +34,7 @@ public class Tool {
             }
             return ResponseEntity.ok(new NewToolResponse(request.getName(), request.getDescription(), arguments));
         } else {
-            return new ResponseEntity<>("Tool already exists", null, 400);
+            return ResponseEntity.status(400).body("Tool already exists");
         }
     }
 }