misc improvements in js protocol execution

[tarunKoyalwar]

Proposed Changes

• fix infinite hang on smbInfo ( retry with smbv1) (ref: https://github.com/projectdiscovery/aurora/issues/508)
• Global Javascript protocol script execution control using -timeout flag
• Custom timeout field in javascript protocol (allowed with sane limits 10 < timeout < 180s)
• default timeout of 6 * -timeout in code protocol

$  ./nuclei -t a.yaml -v -svd -timeout 2 -code      

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.1.5

		projectdiscovery.io

[VER] Started metrics server at localhost:9092
[INF] Current nuclei version: v3.1.5 (latest)
[INF] Current nuclei-templates version: v9.7.3 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 46
[INF] Templates loaded for current scan: 1
[INF] Executing 1 signed templates from tarun
[VER] [py-code-snippet] Executed code on local machine 
[DBG] Code Protocol request variables: 
	1. Hostname => 
	2. Input => 

[DBG] Code Protocol response variables: 
	1. input => 
	2. interactsh-server => 
	3. response => 
	4. stderr => context deadline exceeded
	5. template-id => py-code-snippet
	6. template-info => {py-code-snippet pdteam c .... nil> {info} map[] <nil> }
	7. template-path => /Users/tarun/Codebase/nuclei/a.yaml
	8. type => code

[py-code-snippet:error] [code] [info]  ["context deadline exceeded"]