Add .solargraph_example.yml configuration file

.gitignore

@@ -105,3 +105,4 @@ ee/changelogs/unreleased-ee
 tags.lock
 tags.temp
 .stylelintcache
+.solargraph.yml

.solargraph_example.yml

+---
+include:
+- "**/*.rb"
+exclude:
+- spec/**/*
+- ee/spec/**/*
+- qa/qa/specs/features/**/*
+- test/**/*
+- vendor/**/*
+- ".bundle/**/*"
+require: []
+domains: []
+reporters:
+- rubocop
+- require_not_found
+require_paths: []
+plugins: []
+max_files: 15000