refactor: improve zinit process handling

- Improved error handling in `get` method of Zinit struct.
- Changed the return type of `new()` function in `zinit_factory.v` to `!&Zinit`.
- Updated `zinit_global_manager` to hold references to `Zinit` instances.

Co-authored-by: mariobassem12 <mariobassem12@gmail.com>

lib/osal/zinit/zinit.v

@@ -91,8 +91,11 @@ fn (mut zinit Zinit) cmd_write(name string, cmd string, cat string, env map[stri
 
 pub fn (mut zinit Zinit) get(name_ string) !ZProcess {
 	name := texttools.name_fix(name_)
-	// console.print_debug(zinit)
-	return zinit.processes[name] or { return error("cannot find process in zinit:'${name}'") }
+	if zinit.processes.keys().contains(name) {
+		return zinit.processes[name]
+	}
+
+	return error("cannot find process in zinit:'${name}'")
 }
 
 pub fn (mut zinit Zinit) exists(name_ string) bool {

lib/osal/zinit/zinit_factory.v

@@ -5,16 +5,16 @@ import freeflowuniverse.herolib.ui.console
 import freeflowuniverse.herolib.osal
 
 __global (
-	zinit_global_manager []Zinit
+	zinit_global_manager []&Zinit
 )
 
-pub fn new() !Zinit {
+pub fn new() !&Zinit {
 	if zinit_global_manager.len == 0 {
 		mut z := Zinit{
 			path:     pathlib.get_dir(path: '/etc/zinit', create: true)!
 			pathcmds: pathlib.get_dir(path: '/etc/zinit/cmds', create: true)!
 		}
-		zinit_global_manager << z
+		zinit_global_manager << &z
 		z.load()!
 	}
 	return zinit_global_manager[0]