fix: use the 0install pnpm feed in localized pnpm snippets

Every locale ships its own pnpm.bash, and a locale's own snippet takes
precedence over the English fallback, so the 0install conditional added
to the English snippet never applied anywhere else.

Combined with ReleaseCodeBox skipping the Corepack install step for
0install with pnpm, non-English locales were left running
`corepack enable pnpm` without Corepack present on Node.js 25 and later.

Only the command line changed; the translated comments are untouched.

Author: bastianeicher

apps/site/snippets/ar/download/pnpm.bash

@@ -1,5 +1,5 @@
 # تحميل و تثبيت pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # توثيق اصدار pnpm:
 pnpm -v

apps/site/snippets/es/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Descarga e instala pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Verifica versión de pnpm:
 pnpm -v

apps/site/snippets/fr/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Télécharger et installer pnpm :
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Vérifier la version de pnpm :
 pnpm -v

apps/site/snippets/id/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Unduh dan pasang pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Verifikasi versi pnpm:
 pnpm -v

apps/site/snippets/ja/download/pnpm.bash

@@ -1,5 +1,5 @@
 # pnpmをダウンロードしてインストールする：
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # pnpmのバージョンを確認する：
 pnpm -v

apps/site/snippets/ko/download/pnpm.bash

@@ -1,5 +1,5 @@
 # pnpm 다운로드 및 설치:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # pnpm 버전 확인:
 pnpm -v

apps/site/snippets/pt-br/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Baixar e instalar o pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Verificar a versão do pnpm:
 pnpm -v

apps/site/snippets/pt/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Descarregar e instalar a pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Consultar a versão da pnpm:
 pnpm -v

apps/site/snippets/ro/download/pnpm.bash

@@ -1,5 +1,5 @@
 # Descarcă și instalează pnpm:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # Verifică versiunea pnpm:
 pnpm -v

apps/site/snippets/ta/download/pnpm.bash

@@ -1,5 +1,5 @@
 # pnpm-ஐ பதிவிறக்கம் செய்து நிறுவவும்:
-corepack enable pnpm
+${props.installMethod === 'ZEROINSTALL' ? '0install add pnpm https://apps.0install.net/javascript/pnpm.xml' : 'corepack enable pnpm'}
 
 # pnpm பதிப்பைச் சரிபார்க்கவும்:
 pnpm -v