fix: correct generator command and templates

- Correct the `generator` command to use a string flag for the path.
- Update templates to use correct heap allocation annotation.
- Remove unnecessary code in templates.

Co-authored-by: mahmmoud.hassanein <mahmmoud.hassanein@gmail.com>

lib/core/generator/generic/templates/objname_factory_.vtemplate

@@ -115,9 +115,8 @@ pub fn play(args_ PlayArgs) ! {
     if install_actions.len > 0 {
         for install_action in install_actions {
             mut p := install_action.params
-            mycfg:=cfg_play(p)!
+            cfg_play(p)!
             console.print_debug("install action ${args.name}.configure\n??{mycfg}")
-            set(mycfg)!
         }
     }
     @end

lib/core/generator/generic/templates/objname_model.vtemplate

@@ -44,7 +44,7 @@ pub fn heroscript_default() !string {
 
 //THIS THE THE SOURCE OF THE INFORMATION OF THIS FILE, HERE WE HAVE THE CONFIG OBJECT CONFIGURED AND MODELLED
 @if args.cat == .installer
-@[heap]
+^^[heap]
 pub struct ${args.classname} {
 pub mut:
     name string = 'default'
@@ -83,7 +83,7 @@ fn cfg_play(p paramsparser.Params) !${args.classname} {
 
 @else
 
-@[heap]
+^^[heap]
 pub struct ${args.classname} {
 pub mut:
     name string = 'default'

lib/core/herocmds/generator.v

@@ -21,7 +21,7 @@ pub fn cmd_generator(mut cmdroot Command) {
 	})
 
 	cmd_run.add_flag(Flag{
-		flag:        .bool
+		flag:        .string
 		required:    false
 		name:        'path'
 		abbrev:      'p'