adding lock files and local node-sdk to gitignore

Author: bwang-icf

.gitignore

@@ -31,5 +31,8 @@ sandbox.env
 
 config.ts
 .bluebutton-config.json
+package-lock.json
+yarn.lock
+
 # Snyk Security Extension - AI Rules (auto-generated)
-.github/instructions/snyk_rules.instructions.md
+.github/instructions/snyk_rules.instructions.md