chore(docs): gitignore docs examples (#21167)

new docs testing procedures have made sometimes messy git changes, this
should avoid that, from slack

Author: sklppy88

docs/examples/ts/.gitignore

@@ -0,0 +1,12 @@
+# Generated by bootstrap validation (yarn init, yarn add, tsc, codegen).
+# Cleanup runs via trap but may not fire if bootstrap is interrupted or parallel kills jobs.
+*/.editorconfig
+*/.gitattributes
+*/.gitignore
+*/.yarnrc.yml
+*/package.json
+*/README.md
+*/tsconfig.json
+*/codegenCache.json
+*/artifacts/
+joblog.txt