feat: add missing file extensions to DEFAULT_INCLUDED_PATTERNS (#119)

Add 19 file extensions from the supported languages table in README.md
that were missing from the default include patterns: Ruby, Swift, Kotlin,
Scala, R, HTML, CSS/SCSS, JSON, XML, YAML, TOML, Solidity, Pascal/Delphi,
DTD, and Fortran.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: georgeh0

src/cocoindex_code/settings.py

@@ -45,6 +45,29 @@
     "**/*.rst",  # reStructuredText
     "**/*.php",  # PHP
     "**/*.lua",  # Lua
+    "**/*.rb",  # Ruby
+    "**/*.swift",  # Swift
+    "**/*.kt",  # Kotlin
+    "**/*.kts",  # Kotlin script
+    "**/*.scala",  # Scala
+    "**/*.r",  # R
+    "**/*.html",  # HTML
+    "**/*.htm",  # HTML
+    "**/*.css",  # CSS
+    "**/*.scss",  # SCSS
+    "**/*.json",  # JSON
+    "**/*.xml",  # XML
+    "**/*.yaml",  # YAML
+    "**/*.yml",  # YAML
+    "**/*.toml",  # TOML
+    "**/*.sol",  # Solidity
+    "**/*.pas",  # Pascal
+    "**/*.dpr",  # Pascal/Delphi
+    "**/*.dtd",  # DTD
+    "**/*.f",  # Fortran
+    "**/*.f90",  # Fortran
+    "**/*.f95",  # Fortran
+    "**/*.f03",  # Fortran
 ]
 
 DEFAULT_EXCLUDED_PATTERNS: list[str] = [