issue 5212 timeout added to trace and error logs using ts switch

[oscarintherocks]

Proposed changes

Enhance proposed in issue #5212
Added Timestamp field to both trace log and error log only if -ts switch is enabled

Before this PR, trace log and error log look like:
nuclei -tlog t1.log -tags postgresql -u https://www.example.com -elog e1.log -ts
{"template":"pgsql-extensions-rce","type":"javascript","input":"www.example.com:5432","address":"www.example.com:5432","error":"port closed or filtered","kind":"network-permanent-error"}

After the PR, using -ts switch:
nuclei -tlog t1.log -tags postgresql -u https://www.example.com -elog e1.log -ts
{"template":"pgsql-extensions-rce","type":"javascript","input":"www.example.com:5432","timestamp":"2024-06-14T17:47:05.3112785+02:00","address":"www.example.com:5432","error":"port closed or filtered","kind":"network-permanent-error"}

Without -ts switch, trace and error log don't include timestamp field

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[oscarintherocks]

if you guide me I can create unit tests. It's only 2 checks:

• execute nuclei with -tlog and -ts and check if trace file contains the keyword "timestamp"
• execute nuclei with -tlog but without -ts and check if trace file doesn't contain the keyword "timestamp"

[tarunKoyalwar]

lgtm !

i think we can skip unit test for this , since the logic is very simple and straightforward