[Website] Version 13.0.0 blog post (#382)

PR to start adding the blog post information for the Release 13.0.0

The 13.0.0 milestone with all the GitHub closed issues can be found
here:
https://github.com/apache/arrow/milestone/53?closed=1

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Co-authored-by: Antoine Pitrou <[email protected]>
Co-authored-by: Weston Pace <[email protected]>
Co-authored-by: David Li <[email protected]>
Co-authored-by: Matt Topol <[email protected]>
Co-authored-by: Alenka Frim <[email protected]>
Co-authored-by: david dali susanibar arce <[email protected]>
Co-authored-by: Eric Erhardt <[email protected]>
Co-authored-by: Sutou Kouhei <[email protected]>
Co-authored-by: Kenta Murata <[email protected]>
Co-authored-by: Nic Crane <[email protected]>
Co-authored-by: Dominik Moritz <[email protected]>
Co-authored-by: Joris Van den Bossche <[email protected]>