Arch Linux

Description:

In comparison to versions before 20221102-1, the version 20221102-1 no longer comes with the .idx files of the thesaurus.
The absence of .idx files makes this thesaurus unusable in libreoffice writer.

Additional info:
* Package version: 20221102-1
* Guides to using thesaurus in libreoffice-writer:
** https://www.libreofficehelp.com/thesaurus-libreoffice/
** https://wiki.archlinux.org/title/LibreOffice#Thesaurus

Steps to reproduce:
* Install libreoffice (libreoffice-fresh)
* Install libmythes and mythes-en
* Open libreoffice-writer and go to Tools > Options > Language Settings > Writing Aids to enable MyThes Thesaurus
* type some words and press ctrl-F7
* No synonyms appear (in previous version 20060306-6 synonyms would appear)

Proposed Fix:

The current upstream ("git+https://anongit.freedesktop.org/git/libreoffice/dictionaries.git") does not come with the .idx files.
Would it be possible for this package to generate the .idx files using the th_gen_idx.py tool (https://github.com/hunspell/mythes/blob/master/th_gen_idx.pl) from libmythes in the PKGBUILD?