feat: add gitignore and gitattributes file

.gitattributes

@@ -0,0 +1,8 @@
+/.* export-ignore
+CHANGELOG.txt export-ignore
+composer.* export-ignore
+package.json export-ignore
+phpcs.ruleset.xml export-ignore
+phpunit.* export-ignore
+README.md export-ignore
+tests export-ignore

.gitignore

@@ -0,0 +1,49 @@
+# Unit tests
+/tmp
+/tests/bin/tmp
+
+# Numerous always-ignore extensions
+.diff
+.err
+.orig
+.log
+.rej
+.swo
+.swp
+.vi
+~
+.sass-cache
+
+# OS or Editor folders
+.DS_Store
+Thumbs.db
+.cache
+.project
+.settings
+.tmproj
+*.esproj
+nbproject
+*.sublime-project
+*.sublime-workspace
+.vscode
+
+# Dreamweaver added files
+_notes
+dwsync.xml
+
+# Komodo
+*.komodoproject
+.komodotools
+
+# Folders to ignore
+.hg
+.svn
+.CVS
+intermediate
+.idea
+cache
+node_modules
+assets/dist/
+
+# Composer
+vendor