centralized nuclei config management

[tarunKoyalwar]

Nuclei version:

dev | main

Proposed Changes

• nuclei has many config files ex: ( .nuclei-ignore, .templates-config.json , config.yaml) these config files are used throughout the codebase with different helper functions and redundant error checks and lot of duplicated code .

• nuclei config should be centralized in gologger.DefaultLogger format . and all config management / updates should be abstracted through this . this automatically takes care of edgecases like (changing directory , missing files , parent directory does not exist and lot more )

• template directory is also used in multiple locations and is used by almost every package by passing it through functions , types etc . this makes it extremely complex to handle cases where template directory is changed . template directory should be included in ^ default config this makes it more robust and avoids issue caused due to missing directory path