Fix main interface configuration button

Main Interface Updates:
- Changed configuration button link from admin/setup.php to admin/setup_mvp.php
- Updated button text from 'ConfigureModule' to 'ConfigurePCGAccounts'
- Added new translation keys in both English and French
- Button now correctly points to our custom MVP setup page

This fixes the issue where the button was taking users to the standard
Dolibarr configuration page instead of our custom CA-3 setup interface.

declarationtvaindex.php

@@ -177,7 +177,7 @@ print '</div>';
 print '<div class="fiche">';
 print '<div class="titre">' . $langs->trans("DeclarationTVAConfiguration") . '</div>';
 print '<div class="info">';
-print '<a href="admin/setup.php" class="butAction">' . $langs->trans("ConfigureModule") . '</a>';
+print '<a href="admin/setup_mvp.php" class="butAction">' . $langs->trans("ConfigurePCGAccounts") . '</a>';
 print '</div>';
 print '</div>';
 

langs/en_US/declarationtva.lang

@@ -370,3 +370,5 @@ SelectedAccounts = Selected Accounts
 AccountCount = Account Count
 ErrorCSRFToken = Security token error. Please try again.
 NoChangesDetected = No changes detected in the configuration.
+DeclarationTVAConfiguration = DeclarationTVA Configuration
+ConfigurePCGAccounts = Configure PCG Accounts

langs/fr_FR/declarationtva.lang

@@ -359,3 +359,5 @@ SelectedAccounts = Comptes sélectionnés
 AccountCount = Nombre de comptes
 ErrorCSRFToken = Erreur de jeton de sécurité. Veuillez réessayer.
 NoChangesDetected = Aucun changement détecté dans la configuration.
+DeclarationTVAConfiguration = Configuration DeclarationTVA
+ConfigurePCGAccounts = Configurer les comptes PCG