feat(lib): NIST SP-800-66 Rev.2 Restructuring (#2001)

* NIST SP-800-66 Rev.2 Update

In the Excel file :
- The questions for each task were separated into a specific column, and the "answers" sheet was created in order to use the web app's question system. The type of each question was also assigned.
- Implementation groups were assigned to each task in a specific column. There are 3 distinct groups: "Required", "Addressable" and "Neutral".  The “imp_grp” sheet has also been created to use the web app's implementation group system.

In the Python file :
- It has been updated in order to import everything in the correct format into an Excel file, as in the file in this commit.
- Despite the automation achieved, the questions starting with "If" need to be manually reviewed in the Excel file. There are only a few of them.

The YAML file is the updated version of the framwork from this commit's Excel file.

* Comment Fix

* NIST SP-800-66 Rev.2 Fix

Compatibility mode applied to YAML file to avoid breaking existing files.

* NIST SP-800-66 Rev2 copied in backend directory

* chore: remove useless yaml in tools

* NIST SP-800-66 Rev.2 URN IDs Fix + Improvements

The URN IDs of every node should now correspond to the old URN IDs of the previous version.

Requirement numbering has been added, as in the official framework format.

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Co-authored-by: Mohamed-Hacene <mohamedhacene.b@gmail.com>

Author: juliangit971