Reinstall mail templates

Reinstalls mail templates for all activated B2B addons.

bin/console b2b:mail-templates:reinstall

Restores email templates to default B2B Sellers configuration.

Requirements:

• All addons must be installed and activated

Process:

1. Forces reinstallation of core mail templates

2. Dispatches ReinstallMailTemplatesEvent for addons

3. Preserves customizations by addon event handlers (if implemented)

Use Case:

• After template corruption

• Applying template updates from plugin upgrades

• Restoring deleted templates

May overwrite manual template customizations.