chore: standardize repository configuration

.editorconfig

@@ -1,8 +1,27 @@
-# This file is for standardising the coding style between different editors
-# http://editorconfig.org/
+# EditorConfig
+# https://editorconfig.org/
+#
+# Consistent formatting for project files.
 
 root = true
 
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{php,js,css,json,html,htm,txt,md,yml,yaml,xml,twig}]
+charset = utf-8
+indent_style = tab
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.{txt,md,yml,yaml}]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_style = space
+
+# Existing project-specific settings
 [*]
 end_of_line = lf
 indent_size = 4
@@ -16,3 +35,7 @@ trim_trailing_whitespace = false
 [*.yml]
 indent_size = 4
 indent_style = space
+
+# YAML requires spaces rather than tabs.
+[*.{yml,yaml}]
+indent_style = space

.gitattributes

@@ -1,6 +1,8 @@
-# Normalize line endings to LF in the repository
+# Shared line endings and binary files
 * text=auto eol=lf
 
+# Normalize line endings to LF in the repository
+
 # Never convert line endings in binary files
 *.png binary
 *.jpg binary
@@ -9,10 +11,6 @@
 *.webp binary
 *.ico binary
 
-# .gitignore is LF, but its macOS "Icon" rule needs a literal carriage
-# return in the pattern; store the file exactly as written
-.gitignore -text
-
 tests/			export-ignore
 .github/		export-ignore
 .gitignore		export-ignore

.gitignore

@@ -1,43 +1,115 @@
+# =========================
+# Build and Dependencies
+# =========================
+
+/build/
+/vendor/
+
+# =========================
+# Ghostwriter
+# =========================
+
+# Ghostwriter backup markdown files
+*.md.backup
+
+# =========================
+# Windows
+# =========================
+
 # Windows image file caches
 Thumbs.db
 ehthumbs.db
 
-# Folder config file
+# Folder configuration file
 Desktop.ini
 
 # Recycle Bin used on file shares
 $RECYCLE.BIN/
 
-# Windows Installer files
-*.cab
-*.msi
-*.msm
-*.msp
-
 # =========================
-# Operating System Files
-# =========================
-
-# OSX
+# macOS
 # =========================
 
 .DS_Store
 .AppleDouble
 .LSOverride
 
-# Icon must end with two \r
-Icon
+# Custom folder icons
+Icon?
 
 # Thumbnails
 ._*
 
-# Files that might appear on external disk
+# Files that might appear on external disks
 .Spotlight-V100
 .Trashes
 
-# Directories potentially created on remote AFP share
+# Directories potentially created on remote AFP shares
 .AppleDB
 .AppleDesktop
 Network Trash Folder
 Temporary Items
 .apdisk
+
+# =========================
+# PHP / Composer
+# =========================
+
+vendor
+composer.phar
+
+# =========================
+# Python
+# =========================
+
+__pycache__/
+*.py[cod]
+.venv/
+venv/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.tox/
+.nox/
+.coverage
+.coverage.*
+htmlcov/
+
+# =========================
+# JavaScript / Node
+# =========================
+
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# =========================
+# Local environment and editor files
+# =========================
+
+.env
+.env.*
+!.env.example
+!.env.*.example
+*~
+*.backup
+*.bk
+*.bak
+*.swp
+*.swo
+
+# =========================
+# Local review output
+# =========================
+
+output*.txt
+*-review-*.md
+
+# IDE files
+.idea/
+*.iws
+.idea_modules/
+atlassian-ide-plugin.xml
+/nbproject/