update logic + config management refactor

[tarunKoyalwar]

Proposed Changes

• replace old version check endpoint with new pdtm version check endpoint
• uses standard/default tool self update logic from utils/update + shows release notes on update
• config management refactor (Ref: centralized nuclei config management #3572)
• update logic refactor
  • template update/ install logic is done from internal.installer package which uses most of existing logic from utils/update
  • centrailized template management with templateManager
  • ref: use utils/update for updates #3428

// package install provides helper functions for all download and installation of following tasks:
// 1. downloading and install nuclei templates
// 2. download and update nuclei binary (i.e self update)
// 3. version check for nuclei binary & templates

• based on update utils refactor and improvements utils#131
  • Nuclei now properly handles update logic if nuclei is installed from dev branch

  If installed tool is from dev branch ex: v2.9.1-dev it is flaged as outdated and available for update if v2.9.1 is released

[tarunKoyalwar]

• all config related stuff is available at v2/pkg/catalog/config
• all template management stuff is available at v2/internal/installer

[tarunKoyalwar]

[Mzack9999]

lgtm - suggesting minor change for string comparison