Migrate module path from kyle/ to mc/ org

All import paths updated to git.wntrmute.dev/mc/. Bumps mcdsl to v1.2.0.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/engine/ca/ca.go

@@ -21,8 +21,8 @@ import (
 
 	"git.wntrmute.dev/kyle/goutils/certlib/certgen"
 
-	"git.wntrmute.dev/kyle/metacrypt/internal/barrier"
-	"git.wntrmute.dev/kyle/metacrypt/internal/engine"
+	"git.wntrmute.dev/mc/metacrypt/internal/barrier"
+	"git.wntrmute.dev/mc/metacrypt/internal/engine"
 )
 
 var (