feat(cli): introduce explicit run/exec subcommands to prevent typo-execution

Prevent the ambiguity where a mistyped subcommand was interpreted as the target
wrapped process.

- Introduce `run` and `exec` (alias) subcommands for launching wrapped processes.
- Promote internal test commands (`test-ns`, `test-args`, `test-lifecycle`) to explicit subcommands.
- Update CLI routing to return an error for unknown subcommands instead of falling back to the default execution path.
- Update `README.md` usage examples and all test suites to use the new subcommand structure.

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/e2e/lifecycle_test.go b/tests/e2e/lifecycle_test.go
index d0d7271..8158593 100644
--- a/tests/e2e/lifecycle_test.go
+++ b/tests/e2e/lifecycle_test.go
@@ -76,7 +76,7 @@ func TestNamespaceLifecycleAutomation(t *testing.T) {
 
 	t.Run("ReferenceCounting", func(t *testing.T) {
 		// Start a process that exits quickly
-		cmd1 := exec.Command(binaryPath, "--profile", "default", "--", "sleep", "1.0")
+		cmd1 := exec.Command(binaryPath, "run", "--profile", "default", "--", "sleep", "1.0")
 		cmd1.Env = SetEnvOverrides(map[string]string{"XDG_RUNTIME_DIR": tmpRuntimeDir})
 		cmd1.Stdout = os.Stdout
 		cmd1.Stderr = os.Stderr
@@ -88,7 +88,7 @@ func TestNamespaceLifecycleAutomation(t *testing.T) {
 		waitForLifecycle(t, binaryPath, tmpRuntimeDir, "default", true)
 
 		// Start a second process using the same profile with a longer sleep
-		cmd2 := exec.Command(binaryPath, "--profile", "default", "--", "sleep", "5.0")
+		cmd2 := exec.Command(binaryPath, "run", "--profile", "default", "--", "sleep", "5.0")
 		cmd2.Env = SetEnvOverrides(map[string]string{"XDG_RUNTIME_DIR": tmpRuntimeDir})
 		cmd2.Stdout = os.Stdout
 		cmd2.Stderr = os.Stderr