feat: Add screen installer

- Add a new installer for the `screen` utility.
- This installer supports Ubuntu and macOS.
- Includes functionality for installation, uninstallation,
  and status checking.
- Fixed tests for osal.screen

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

lib/installers/infra/screen/.heroscript

@@ -0,0 +1,13 @@
+
+!!hero_code.generate_installer
+    name:'screen'
+    classname:'Screen'
+    singleton:0
+    templates:0
+    default:1
+    title:''
+    supported_platforms:''
+    reset:0
+    startupmanager:0
+	hasconfig:0
+    build:0

lib/installers/infra/screen/readme.md

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+# screen
+
+
+
+To get started
+
+```vlang
+
+
+import freeflowuniverse.herolib.installers.something.screen as screen_installer
+
+heroscript:="
+!!screen.configure name:'test'
+    password: '1234'
+    port: 7701
+
+!!screen.start name:'test' reset:1 
+"
+
+screen_installer.play(heroscript=heroscript)!
+
+//or we can call the default and do a start with reset
+//mut installer:= screen_installer.get()!
+//installer.start(reset:true)!
+
+
+
+
+```
+
+## example heroscript
+
+```hero
+!!screen.configure
+    homedir: '/home/user/screen'
+    username: 'admin'
+    password: 'secretpassword'
+    title: 'Some Title'
+    host: 'localhost'
+    port: 8888
+
+```
+
+

lib/installers/infra/screen/screen_actions.v

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+module screen
+
+import freeflowuniverse.herolib.core
+import freeflowuniverse.herolib.ui.console
+import freeflowuniverse.herolib.installers.ulist
+import os
+
+//////////////////// following actions are not specific to instance of the object
+
+// checks if a certain version or above is installed
+fn installed() !bool {
+	res := os.execute('screen --version')
+	if res.exit_code != 0 {
+		return false
+	}
+
+	return true
+}
+
+// get the Upload List of the files
+fn ulist_get() !ulist.UList {
+	// optionally build a UList which is all paths which are result of building, is then used e.g. in upload
+	return ulist.UList{}
+}
+
+// uploads to S3 server if configured
+fn upload() ! {
+}
+
+fn install() ! {
+	console.print_header('install screen')
+
+	if core.is_ubuntu()! {
+		res := os.execute('sudo apt install screen -y')
+		if res.exit_code != 0 {
+			return error('failed to install screen: ${res.output}')
+		}
+	} else if core.is_osx()! {
+		res := os.execute('sudo brew install screen')
+		if res.exit_code != 0 {
+			return error('failed to install screen: ${res.output}')
+		}
+	} else {
+		return error('unsupported platform: ${core.platform()!}')
+	}
+}
+
+fn destroy() ! {
+	console.print_header('uninstall screen')
+	if core.is_ubuntu()! {
+		res := os.execute('sudo apt remove screen -y')
+		if res.exit_code != 0 {
+			return error('failed to uninstall screen: ${res.output}')
+		}
+	} else if core.is_osx()! {
+		res := os.execute('sudo brew uninstall screen')
+		if res.exit_code != 0 {
+			return error('failed to uninstall screen: ${res.output}')
+		}
+	} else {
+		return error('unsupported platform: ${core.platform()!}')
+	}
+}

lib/installers/infra/screen/screen_factory_.v

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+module screen
+
+import freeflowuniverse.herolib.ui.console
+import freeflowuniverse.herolib.sysadmin.startupmanager
+import freeflowuniverse.herolib.osal.zinit
+
+__global (
+	screen_global  map[string]&Screen
+	screen_default string
+)
+
+/////////FACTORY
+
+@[params]
+pub struct ArgsGet {
+pub mut:
+	name string
+}
+
+pub fn get(args_ ArgsGet) !&Screen {
+	return &Screen{}
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+//////////////////////////# LIVE CYCLE MANAGEMENT FOR INSTALLERS ///////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+fn startupmanager_get(cat zinit.StartupManagerType) !startupmanager.StartupManager {
+	// unknown
+	// screen
+	// zinit
+	// tmux
+	// systemd
+	match cat {
+		.zinit {
+			console.print_debug('startupmanager: zinit')
+			return startupmanager.get(cat: .zinit)!
+		}
+		.systemd {
+			console.print_debug('startupmanager: systemd')
+			return startupmanager.get(cat: .systemd)!
+		}
+		else {
+			console.print_debug('startupmanager: auto')
+			return startupmanager.get()!
+		}
+	}
+}
+
+@[params]
+pub struct InstallArgs {
+pub mut:
+	reset bool
+}
+
+pub fn (mut self Screen) install(args InstallArgs) ! {
+	switch(self.name)
+	if args.reset || (!installed()!) {
+		install()!
+	}
+}
+
+pub fn (mut self Screen) destroy() ! {
+	switch(self.name)
+	destroy()!
+}
+
+// switch instance to be used for screen
+pub fn switch(name string) {
+	screen_default = name
+}

lib/installers/infra/screen/screen_model.v

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+module screen
+
+const singleton = false
+const default = true
+
+// THIS THE THE SOURCE OF THE INFORMATION OF THIS FILE, HERE WE HAVE THE CONFIG OBJECT CONFIGURED AND MODELLED
+@[heap]
+pub struct Screen {
+pub mut:
+	name string = 'default'
+}
+
+fn obj_init(obj_ Screen) !Screen {
+	// never call get here, only thing we can do here is work on object itself
+	mut obj := obj_
+	return obj
+}
+
+// called before start if done
+fn configure() ! {
+	// mut installer := get()!
+}