Enhance GEDCOM parsing and update dependencies

[jadsongmatos]

• Improved the __get_indi method in Gedcom class with detailed comments for better understanding of individual parsing.
• Added command-line options for resuming GEDCOM downloads with specified start and end levels.
• Updated requests and fake-useragent dependencies in requirements files.

[Linekio]

Hey, the resume feature seems interesting, but I think you've broken a little too much code. On the other hand, there are too many comments, and they should be in English. Remember that comments should explain the “why” and not the “what.” requests_cache seems unnecessary since getmyancestors never makes the same request twice.

[jadsongmatos]

requests_cache is used when I'm creating a second file where it may have relatives in common, it will be in the cache, sorry for the low quality of the code, I haven't finished what I wanted yet, but I thought it would be cool to share how it's going