container: enter init path early

There is generally no use case where any setup is required before init, and requiring the explicit function call is error-prone and unnecessary. It also causes trouble with packages using a similar trick. This change moves argv0 check early and makes it an import side effect. The stub will be removed in v0.5.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/rosa_test.go

@@ -10,7 +10,6 @@ import (
 	"testing"
 
 	"hakurei.app/check"
-	"hakurei.app/container"
 	"hakurei.app/internal/pkg"
 	"hakurei.app/internal/rosa"
 	"hakurei.app/message"
@@ -28,8 +27,6 @@ var (
 )
 
 func TestMain(m *testing.M) {
-	container.TryArgv0(nil)
-
 	code := m.Run()
 	if buildTestCache != nil {
 		buildTestCacheCancel()