chore: remove empty placeholder example folders

offchain-account-ownership/ and streaming-payments/ contained only a
.gitignore (no example content). Remove them and their references in the
root README.md and CLAUDE.md project structure. Also gitignore the
.playwright-mcp/ tool-artifact directory so it stays out of the repo.

Author: critesjosh

.gitignore

@@ -2,3 +2,4 @@ target
 .DS_Store
 ivc
 node_modules
+.playwright-mcp

CLAUDE.md

@@ -38,8 +38,6 @@ aztec-examples/
 │   ├── tests/              # Vitest integration test suite
 │   └── data.json           # Generated proof data (created by `yarn data`)
 ├── test-wallet-webapp/      # Vite/React app: embedded wallet + deploy + tx
-├── offchain-account-ownership/  # Placeholder for an upcoming example
-├── streaming-payments/      # Placeholder for an upcoming example
 └── .github/workflows/       # CI: one *-tests.yml per tested example
 ```
 

README.md

@@ -42,8 +42,6 @@ Verifying Noir UltraHonk proofs _inside_ an Aztec contract: off-chain proof gene
 
 A minimal Vite/React app that connects to an embedded Aztec wallet/PXE, creates an initializerless Schnorr account, deploys a contract, and sends transactions.
 
-> `offchain-account-ownership/` and `streaming-payments/` are placeholders for upcoming examples.
-
 ## Quick Start
 
 ### Install Aztec Tools