Fix: use GLPI core console for locale extraction

[Rom1-B]

Problem

The Transifex push/sync workflows broke whenever a consuming plugin stopped declaring glpi-project/tools in its own composer.json, since they relied on that plugin dependency to provide vendor/bin/extract-locales and vendor/bin/plugin-release.

Fix

Locale extraction and compilation now run through GLPI core's own console commands (tools:locales:extract, tools:locales:compile) inside the official GLPI GitHub Actions image, so plugins no longer need any translation-tooling dependency in their own composer.json.

[cedric-anne]

The workflow will not be compatible anymore with GLPI 10.x plugins. It may be complex to adapt the workflow to also support GLPI 10.x plugins, so maybe we should publish this change in a v2, since it is a BC-break.

[Rom1-B]

Instead of a v2 (which would require every consuming plugin to update its workflow ref), the workflow now auto-detects: it runs composer install then checks whether vendor/bin/extract-locales exists. Plugins still declaring glpi-project/tools keep using it unchanged; plugins without it (the ones that hit this bug) automatically fall back to GLPI core's console command. No BC-break, no repo changes needed anywhere.

[froozeify]

@Rom1-B That PR looks like #9 did you take inspiration of it ? And probably we will have to close it once one or the other is merged.

It was tested against a fork of Mreporting plugin