ISOPAS 8800 folder creation in standards

[rakcs]

What

Introduce new folder for ISOPAS 8800 in standards & requirements.
https://eclipse-score.github.io/process_description/main/standards/index.html#

Acceptance Criteria (DoD)

New folder created for ISOPAS 8800 in standards as per SCORE folder structure followed for earlier standards like ISO26262.

How

Update https://github.com/eclipse-score/process_description/edit/main/process/standards/index.rst and add ISOPAS 8800

[rakcs]

@masc2023 : I am unable to continue with this task due to capacity and other dependencies/prioritization.