Blog post about new rust Metadata Parser

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

• Part of Use custom thrift decoder to improve speed of parsing parquet metadata #5854

Describe the solution you'd like
I would like to explain / document all the great work @etseidl @jhorstmann and others have done with the new Parquet metadata parser

Describe alternatives you've considered

Idea is to write a blog post about the new metadata parsing, to teach people about parquet metadata and the how our parser is faster

Additional context