fix: add source for stopwords

Author: donghaoren

packages/component/src/lib/text_summarizer/stop_words.ts

@@ -1,7 +1,15 @@
 // Copyright (c) 2025 Apple Inc. Licensed under MIT License.
 
+// Default stopwords are from NLTK (https://www.nltk.org/)
+// Generated with the following for each language in Python:
+// > from nltk.corpus import stopwords
+// > "|".join(stopwords.words("english"))
+// > "|".join(stopwords.words("spanish"))
+// > "|".join(stopwords.words("french"))
+// > "|".join(stopwords.words("german"))
+
 let english =
-  "i|me|my|myself|we|our|ours|ourselves|you|you're|you've|you'll|you'd|your|yours|yourself|yourselves|he|him|his|himself|she|she's|her|hers|herself|it|it's|its|itself|they|them|their|theirs|themselves|what|which|who|whom|this|that|that'll|these|those|am|is|are|was|were|be|been|being|have|has|had|having|do|does|did|doing|a|an|the|and|but|if|or|because|as|until|while|of|at|by|for|with|about|against|between|into|through|during|before|after|above|below|to|from|up|down|in|out|on|off|over|under|again|further|then|once|here|there|when|where|why|how|all|any|both|each|few|more|most|other|some|such|no|nor|not|only|own|same|so|than|too|very|s|t|can|will|just|don|don't|should|should've|now|d|ll|m|o|re|ve|y|ain|aren|aren't|couldn|couldn't|didn|didn't|doesn|doesn't|hadn|hadn't|hasn|hasn't|haven|haven't|isn|isn't|ma|mightn|mightn't|mustn|mustn't|needn|needn't|shan|shan't|shouldn|shouldn't|wasn|wasn't|weren|weren't|won|won't|wouldn|wouldn't";
+  "a|about|above|after|again|against|ain|all|am|an|and|any|are|aren|aren't|as|at|be|because|been|before|being|below|between|both|but|by|can|couldn|couldn't|d|did|didn|didn't|do|does|doesn|doesn't|doing|don|don't|down|during|each|few|for|from|further|had|hadn|hadn't|has|hasn|hasn't|have|haven|haven't|having|he|he'd|he'll|her|here|hers|herself|he's|him|himself|his|how|i|i'd|if|i'll|i'm|in|into|is|isn|isn't|it|it'd|it'll|it's|its|itself|i've|just|ll|m|ma|me|mightn|mightn't|more|most|mustn|mustn't|my|myself|needn|needn't|no|nor|not|now|o|of|off|on|once|only|or|other|our|ours|ourselves|out|over|own|re|s|same|shan|shan't|she|she'd|she'll|she's|should|shouldn|shouldn't|should've|so|some|such|t|than|that|that'll|the|their|theirs|them|themselves|then|there|these|they|they'd|they'll|they're|they've|this|those|through|to|too|under|until|up|ve|very|was|wasn|wasn't|we|we'd|we'll|we're|were|weren|weren't|we've|what|when|where|which|while|who|whom|why|will|with|won|won't|wouldn|wouldn't|y|you|you'd|you'll|your|you're|yours|yourself|yourselves|you've";
 
 let spanish =
   "de|la|que|el|en|y|a|los|del|se|las|por|un|para|con|no|una|su|al|lo|como|más|pero|sus|le|ya|o|este|sí|porque|esta|entre|cuando|muy|sin|sobre|también|me|hasta|hay|donde|quien|desde|todo|nos|durante|todos|uno|les|ni|contra|otros|ese|eso|ante|ellos|e|esto|mí|antes|algunos|qué|unos|yo|otro|otras|otra|él|tanto|esa|estos|mucho|quienes|nada|muchos|cual|poco|ella|estar|estas|algunas|algo|nosotros|mi|mis|tú|te|ti|tu|tus|ellas|nosotras|vosotros|vosotras|os|mío|mía|míos|mías|tuyo|tuya|tuyos|tuyas|suyo|suya|suyos|suyas|nuestro|nuestra|nuestros|nuestras|vuestro|vuestra|vuestros|vuestras|esos|esas|estoy|estás|está|estamos|estáis|están|esté|estés|estemos|estéis|estén|estaré|estarás|estará|estaremos|estaréis|estarán|estaría|estarías|estaríamos|estaríais|estarían|estaba|estabas|estábamos|estabais|estaban|estuve|estuviste|estuvo|estuvimos|estuvisteis|estuvieron|estuviera|estuvieras|estuviéramos|estuvierais|estuvieran|estuviese|estuvieses|estuviésemos|estuvieseis|estuviesen|estando|estado|estada|estados|estadas|estad|he|has|ha|hemos|habéis|han|haya|hayas|hayamos|hayáis|hayan|habré|habrás|habrá|habremos|habréis|habrán|habría|habrías|habríamos|habríais|habrían|había|habías|habíamos|habíais|habían|hube|hubiste|hubo|hubimos|hubisteis|hubieron|hubiera|hubieras|hubiéramos|hubierais|hubieran|hubiese|hubieses|hubiésemos|hubieseis|hubiesen|habiendo|habido|habida|habidos|habidas|soy|eres|es|somos|sois|son|sea|seas|seamos|seáis|sean|seré|serás|será|seremos|seréis|serán|sería|serías|seríamos|seríais|serían|era|eras|éramos|erais|eran|fui|fuiste|fue|fuimos|fuisteis|fueron|fuera|fueras|fuéramos|fuerais|fueran|fuese|fueses|fuésemos|fueseis|fuesen|sintiendo|sentido|sentida|sentidos|sentidas|siente|sentid|tengo|tienes|tiene|tenemos|tenéis|tienen|tenga|tengas|tengamos|tengáis|tengan|tendré|tendrás|tendrá|tendremos|tendréis|tendrán|tendría|tendrías|tendríamos|tendríais|tendrían|tenía|tenías|teníamos|teníais|tenían|tuve|tuviste|tuvo|tuvimos|tuvisteis|tuvieron|tuviera|tuvieras|tuviéramos|tuvierais|tuvieran|tuviese|tuvieses|tuviésemos|tuvieseis|tuviesen|teniendo|tenido|tenida|tenidos|tenidas|tened";