feat: add premium Excel (.xlsx) export and improve CSV encoding

Author: jkdevcode

.env.example

@@ -1,11 +1,11 @@
 LINKEDIN_KEYWORDS=backend developer nodejs nestjs typescript
-LINKEDIN_KEYWORD_VARIANTS=backend developer nodejs nestjs typescript;nodejs backend developer api;nestjs developer typescript backend;express nodejs backend developer
+LINKEDIN_KEYWORD_VARIANTS=backend developer nodejs;Desarrollador de back-end;Desarrollador de back-end javaScript;Desarrollador de back-end nodejs
 JOB_DB_PATH=./data/jobs.db
 LINKEDIN_MAX_JOBS=60
-LINKEDIN_DEFAULT_MODALITY=remote
-LINKEDIN_TARGET_LOCATIONS=Latin America;Colombia
-LINKEDIN_COLOMBIA_CITIES=Bogota, Colombia
-LINKEDIN_REQUIRED_SPANISH_LOCATIONS=Colombia;Bogota, Colombia
-LINKEDIN_PREFERRED_SPANISH_LOCATIONS=Latin America
-LINKEDIN_STRICT_ENGLISH_REJECTION_LOCATIONS=Colombia;Bogota, Colombia
-LINKEDIN_ALLOW_MIXED_LANGUAGE_LOCATIONS=Latin America;Colombia;Bogota, Colombia
+LINKEDIN_DEFAULT_MODALITY=both
+LINKEDIN_TARGET_LOCATIONS=América Latina;Colombia
+LINKEDIN_COLOMBIA_CITIES=Bogotá, Colombia
+LINKEDIN_REQUIRED_SPANISH_LOCATIONS=Colombia;Bogotá, Colombia
+LINKEDIN_PREFERRED_SPANISH_LOCATIONS=América Latina
+LINKEDIN_STRICT_ENGLISH_REJECTION_LOCATIONS=Colombia;Bogotá, Colombia
+LINKEDIN_ALLOW_MIXED_LANGUAGE_LOCATIONS=América Latina;Colombia;Bogotá, Colombia

JOB_SEARCH_RULES.md

@@ -101,7 +101,6 @@ positive_keywords:
   - nodejs
   - node.js
   - nestjs
-  - nest.js
   - express
   - typescript
   - javascript