support file path to base64 in parse

[Hecate2]

Description

An enhancement for https://github.com/neo-project/neo/pull/3482 (but also works alone). Hex string input had already been supported in the method Base64Fixed, and is not considered.

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update (maybe)

How Has This Been Tested?

• [x] Test A parse C:\Users\some_file.nef_or_anything Typically it prints quite a few screens of hex, base64 and instructions, if the input is a .nef path. It works when the input path includes spaces. The user can wrap the input path with or without double quotation marks ", whether the path includes spaces or not.

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules