add regex support for -eh

[dogancanbakir]

Proposed changes

$ cat scan_list.txt 
1.1.1.1
status.example.com
docs.example.com
api.example.com
1.1.1.1/24
*.gov
admin*.gov

$ go run . -list scan_list.txt -eh example

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.1.0-dev

                projectdiscovery.io

[INF] Number of hosts excluded from input: 3
[INF] Supplied input was automatically deduplicated (1 removed).
[INF] Current nuclei version: v3.1.0-dev (development)
[INF] Current nuclei-templates version: v9.6.9 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 73
[INF] Templates loaded for current scan: 7278
[INF] Executing 5266 signed templates from projectdiscovery/nuclei-templates
[WRN] Executing 2027 unsigned templates. Use with caution.
[INF] Targets loaded for current scan: 258
[INF] Running httpx on input host
[INF] Found 255 URL from httpx
[INF] Templates clustered: 1253 (Reduced 314760 Requests)
[ptr-fingerprint] [dns] [info] 1.1.1.1.in-addr.arpa [one.one.one.one.]
[caa-fingerprint] [dns] [info] *.gov
[caa-fingerprint] [dns] [info] admin*.gov
[INF] Using Interactsh Server: oast.me
^C[INF] CTRL+C pressed: Exiting
[INF] Creating resume file: /home/vscode/.cache/nuclei/resume-cliqjsst08rodd1t1h00.cfg
[ERR] Couldn't create resume file: open /home/vscode/.cache/nuclei/resume-cliqjsst08rodd1t1h00.cfg: no such file or directory
exit status 1

Closes #4412.

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)