Massive architectural rework

This commit massively overhauls the project's structure to simplify
development. Most parts are now correctly compartmentalized and
dependencies are passed in a sane way rather than global variables
galore xd.

cmd/daemon/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	_ "net/http/pprof"
+	"os"
+
+	"github.com/juls0730/flux/internal/handlers"
+)
+
+func main() {
+	fluxServer := handlers.NewServer()
+	defer fluxServer.Stop()
+
+	http.HandleFunc("POST /deploy", fluxServer.DeployNewApp)
+
+	http.HandleFunc("GET /apps", fluxServer.GetAllApps)
+	http.HandleFunc("GET /app/by-name/{name}", fluxServer.GetAppByName)
+	http.HandleFunc("GET /app/by-id/{id}", fluxServer.GetAppById)
+
+	http.HandleFunc("PUT /app/{id}/start", fluxServer.StartApp)
+	http.HandleFunc("PUT /app/{id}/stop", fluxServer.StopApp)
+
+	http.HandleFunc("DELETE /apps", fluxServer.DeleteAllDeploymentsHandler)
+	http.HandleFunc("DELETE /app/{id}", fluxServer.DeleteDeployHandler)
+
+	http.HandleFunc("GET /heartbeat", fluxServer.DaemonInfoHandler)
+
+	err := fluxServer.ListenAndServe()
+	if err != nil {
+		fmt.Printf("Failed to start server: %v\n", err)
+		os.Exit(1)
+	}
+}