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.

internal/models/app.go

@@ -0,0 +1,28 @@
+package models
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/google/uuid"
+	docker "github.com/juls0730/flux/internal/docker"
+	"go.uber.org/zap"
+)
+
+type App struct {
+	Id           uuid.UUID   `json:"id,omitempty"`
+	Name         string      `json:"name,omitempty"`
+	Deployment   *Deployment `json:"-"`
+	DeploymentID int64       `json:"deployment_id,omitempty"`
+}
+
+func (app *App) Remove(ctx context.Context, dockerClient *docker.DockerClient, db *sql.DB, logger *zap.SugaredLogger) error {
+	app.Deployment.Remove(ctx, dockerClient, db, logger)
+	_, err := db.ExecContext(ctx, "DELETE FROM apps WHERE id = ?", app.Id[:])
+	if err != nil {
+		logger.Errorw("Failed to delete app", zap.Error(err))
+		return err
+	}
+
+	return nil
+}