use std config directories

[tarunKoyalwar]

Proposed changes

• closes nuclei fails to start when ~/.config is not writable #3576
• depends on make migration configurable goflags#145
• config directory is now changed to env/platform specific config directory
• as attempt to standardise and future use cases . resume files are now moved from config directory to cache directory (both of them are platform/env specific)
• fixes issue related to non-writeable config folders in lambda , nixOs and sandbox env(ex: homebrew)
• -version flag prints config folders as they are platform specific`

$ ./nuclei -version
[INF] Nuclei Engine Version: v3.0.0-dev
[INF] Nuclei Config Directory: /Users/tarun/Library/Application Support/nuclei
[INF] Nuclei Cache Directory: /Users/tarun/Library/Caches/nuclei

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)

[tarunKoyalwar]

Flow of migration

backup config folder just in case

check old config directory

$ la ~/.config/nuclei | wc
      64     569    4862

migration

any first command executed with new nuclei will attempt to migrate and it will only happens once. in this case we print version

$  ./nuclei -version
[INF] Nuclei Engine Version: v3.0.0-dev
[INF] Nuclei Config Directory: /Users/tarun/Library/Application Support/nuclei
[INF] Nuclei Cache Directory: /Users/tarun/Library/Caches/nuclei

Now migration has successfully completed

atomic deletion of old config directory

$ la ~/.config/nuclei | wc
ls: /Users/tarun/.config/nuclei: No such file or directory
       0       0       0

Configs moved to platform specific config directory

$ la ~/Library/Application\ Support/nuclei | wc                               
       9      74     540

Resume files moved to platform specific cache directory

$ la ~/Library/Caches/nuclei | wc
      55     488    4277

[tarunKoyalwar]

TODO

• replace -config-directory string override the default config path ($home/.config) with NUCLEI_CONFIG_DIR since config is used in init() i.e before flag is even parsed
• Try this PR in lambda to validate if fix worked as expected

[ehsandeep]

Additional domain for TrustedTemplateDomain => cloud.projectdiscovery.io