[Feature] Identify FASTA id's

[Kronopt]

Is your feature request related to a problem?
FastaSequence.id should provide more information on the id.
Most FASTA id's are standard and should, therefore, be easy to parse.

Sources:
https://en.wikipedia.org/wiki/FASTA_format#NCBI_identifiers
https://ncbi.github.io/cxx-toolkit/pages/ch_demo#ch_demo.id1_fetch.html_ref_fasta

Describe the solution you'd like
Implement a new class FastaId which should describe a certain FASTA id.
Instances of FastaId should be returned when calling FastaSequence.id