Implement Multi-Process Handling (#7)

Refactor code to support starting of multiple back end llama.cpp servers. This functionality is exposed as `profiles` to create a simple configuration format. 

Changes: 

* refactor proxy tests to get ready for multi-process support
* update proxy/ProxyManager to support multiple processes (#7)
* Add support for Groups in configuration
* improve handling of Model alias configs
* implement multi-model swapping
* improve code clarity for swapModel
* improve docs, rename groups to profiles in config

misc/simple-responder/simple-responder.go

@@ -16,12 +16,16 @@ func main() {
 
 	flag.Parse() // Parse the command-line flags
 
-	// Set up the handler function using the provided response message
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	responseMessageHandler := func(w http.ResponseWriter, r *http.Request) {
 		// Set the header to text/plain
 		w.Header().Set("Content-Type", "text/plain")
 		fmt.Fprintln(w, *responseMessage)
-	})
+	}
+
+	// Set up the handler function using the provided response message
+	http.HandleFunc("/v1/chat/completions", responseMessageHandler)
+	http.HandleFunc("/v1/completions", responseMessageHandler)
+	http.HandleFunc("/test", responseMessageHandler)
 
 	http.HandleFunc("/env", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/plain")
@@ -43,6 +47,11 @@ func main() {
 		w.Write([]byte(response))
 	})
 
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/plain")
+		fmt.Fprintf(w, "%s %s", r.Method, r.URL.Path)
+	})
+
 	address := "127.0.0.1:" + *port // Address with the specified port
 	fmt.Printf("Server is listening on port %s\n", *port)