bug: load vcs support in embedded server always (#858)

* bug: load vcs support in embedded server always

* chore: try always running exec for "sh -c" in engine

Author: ibuildthecloud

Diff for: main.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"github.com/gptscript-ai/gptscript/pkg/cli"
-	// Load all VCS
-	_ "github.com/gptscript-ai/gptscript/pkg/loader/vcs"
 )
 
 func main() {

Diff for: pkg/engine/cmd.go

@@ -328,7 +328,7 @@ func (e *Engine) newCommand(ctx context.Context, extraEnv []string, tool types.T
 	}
 
 	if useShell {
-		args = append([]string{"/bin/sh", "-c"}, strings.Join(args, " "))
+		args = append([]string{"/bin/sh", "-c"}, "exec "+strings.Join(args, " "))
 	} else {
 		args[0] = env.Lookup(envvars, args[0])
 	}

Diff for: pkg/gptscript/gptscript.go

@@ -25,6 +25,9 @@ import (
 	"github.com/gptscript-ai/gptscript/pkg/repos/runtimes"
 	"github.com/gptscript-ai/gptscript/pkg/runner"
 	"github.com/gptscript-ai/gptscript/pkg/types"
+
+	// Load all VCS
+	_ "github.com/gptscript-ai/gptscript/pkg/loader/vcs"
 )
 
 var log = mvl.Package()