✨ feat: Add auth flow (#146)

This adds a simple way to incorporate a centralized authentication flow.

The idea is to have the user, API and SSH (for machine authentication)
all in one place using `openauthjs` + `SST`

We also have a database now :)

> We are using InstantDB as it allows us to authenticate a use with just
the email. Plus it is super simple simple to use _of course after the
initial fumbles trying to design the db and relationships_

packages/cli/internal/session/steam.go

@@ -0,0 +1,76 @@
+package session
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"strings"
+
+	"github.com/docker/docker/api/types/container"
+)
+
+// ExecResult holds the output from a container command
+type ExecResult struct {
+	ExitCode int
+	Stdout   string
+	Stderr   string
+}
+
+func (s *Session) execInContainer(ctx context.Context, cmd []string) (*ExecResult, error) {
+	execConfig := container.ExecOptions{
+		Cmd:          cmd,
+		AttachStdout: true,
+		AttachStderr: true,
+	}
+
+	execID, err := s.client.ContainerExecCreate(ctx, s.containerID, execConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := s.client.ContainerExecAttach(ctx, execID.ID, container.ExecAttachOptions{})
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Close()
+
+	var outBuf bytes.Buffer
+	_, err = io.Copy(&outBuf, resp.Reader)
+	if err != nil {
+		return nil, err
+	}
+
+	inspect, err := s.client.ContainerExecInspect(ctx, execID.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	return &ExecResult{
+		ExitCode: inspect.ExitCode,
+		Stdout:   outBuf.String(),
+	}, nil
+}
+
+// CheckSteamGames returns the list of installed games in the container
+func (s *Session) CheckInstalledSteamGames(ctx context.Context) ([]uint64, error) {
+	result, err := s.execInContainer(ctx, []string{
+		"sh", "-c",
+		"find /home/nestri/.steam/steam/steamapps -name '*.acf' -exec grep -H '\"appid\"' {} \\;",
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to check steam games: %v", err)
+	}
+
+	var gameIDs []uint64
+	for _, line := range strings.Split(result.Stdout, "\n") {
+		if strings.Contains(line, "appid") {
+			var id uint64
+			if _, err := fmt.Sscanf(line, `"appid" "%d"`, &id); err == nil {
+				gameIDs = append(gameIDs, id)
+			}
+		}
+	}
+
+	return gameIDs, nil
+}