feat: add i18n support for speakers

Restructure speakers data to language subdirectories (es/en/ca)
following the same pattern as jobs/. Translate diego.md to English
and Catalan. Update SectionSpeakers.astro to load by current language.

Author: itziarZG

src/components/home/SectionSpeakers.astro

@@ -5,17 +5,31 @@ import CenteredPanel from '../CenteredPanel.astro'
 import type { ISpeaker } from '../../types/speakers'
 import SpeakerCard from './SpeakerCard.astro'
 
-const speakers = Object.values(import.meta.glob('../../data/speakers/*.md', { eager: true })) as {
-  frontmatter: ISpeaker
-}[]
-
 interface Props {
   lang: string
 }
 
 const { lang } = Astro.props
 const t = texts[lang as keyof typeof texts]
 
+const esSpeakers = Object.values(import.meta.glob('../../data/speakers/es/*.md', { eager: true })) as {
+  frontmatter: ISpeaker
+}[]
+const enSpeakers = Object.values(import.meta.glob('../../data/speakers/en/*.md', { eager: true })) as {
+  frontmatter: ISpeaker
+}[]
+const caSpeakers = Object.values(import.meta.glob('../../data/speakers/ca/*.md', { eager: true })) as {
+  frontmatter: ISpeaker
+}[]
+
+const allSpeakersMap: Record<string, { frontmatter: ISpeaker }[]> = {
+  es: esSpeakers,
+  en: enSpeakers,
+  ca: caSpeakers,
+}
+
+const speakers = allSpeakersMap[lang] || []
+
 const sortedSpeakers = speakers.map((s) => s.frontmatter).sort((a, b) => a.order - b.order)
 
 const count = sortedSpeakers.length

src/data/speakers/ca/diego.md

@@ -0,0 +1,21 @@
+---
+name: 'Diego Russo'
+order: 1
+photo: '/speakers/diego.jpg'
+links:
+  - type: 'github'
+    url: 'https://github.com/diegorusso'
+  - type: 'linkedin'
+    url: 'https://www.linkedin.com/in/diegor/'
+  - type: 'bluesky'
+    url: 'https://bsky.app/profile/diegor.it'
+  - type: 'twitter'
+    url: 'https://x.com/diegor'
+  - type: 'instagram'
+    url: 'https://www.instagram.com/diegor.it'
+description: |
+  Diego Russo és desenvolupador core de CPython i enginyer cap de software de l'equip de Runtimes d'Arm, amb seu a Cambridge (Regne Unit).
+  Fa servir Python des del 2006 i contribueix a CPython des del 2023, centrant-se en el rendiment de l'intèrpret, el treball relacionat amb JIT, la infraestructura d'integració contínua i en garantir que CPython i el seu ecosistema funcionin de manera fiable i eficient a les plataformes Arm.
+  El seu treball es troba a la intersecció entre el temps d'execució, l'enginyeria de rendiment i la col·laboració de codi obert a gran escala.
+  Diego és també organitzador d'EuroPython i dirigeix l'Arm Python Guild, una comunitat interna de més de 1.400 desenvolupadors de Python que treballen a tota l'empresa.
+---

src/data/speakers/en/diego.md

@@ -0,0 +1,21 @@
+---
+name: 'Diego Russo'
+order: 1
+photo: '/speakers/diego.jpg'
+links:
+  - type: 'github'
+    url: 'https://github.com/diegorusso'
+  - type: 'linkedin'
+    url: 'https://www.linkedin.com/in/diegor/'
+  - type: 'bluesky'
+    url: 'https://bsky.app/profile/diegor.it'
+  - type: 'twitter'
+    url: 'https://x.com/diegor'
+  - type: 'instagram'
+    url: 'https://www.instagram.com/diegor.it'
+description: |
+  Diego Russo is a CPython core developer and Head of Software Engineering on Arm's Runtimes team, based in Cambridge (United Kingdom).
+  He has been using Python since 2006 and contributing to CPython since 2023, focusing on interpreter performance, JIT-related work, continuous integration infrastructure, and ensuring that CPython and its ecosystem run reliably and efficiently on Arm platforms.
+  His work sits at the intersection of runtime engineering, performance engineering, and large-scale open source collaboration.
+  Diego is also an EuroPython organizer and leads the Arm Python Guild, an internal community of over 1,400 Python developers working across the company.
+---