fix: bool create now writes .bool/config

[dax5000]

What

After a successful bool create, write the slug and name to .bool/config in the current directory.

Why

Previously, bool create followed by bool deploy . would create a duplicate Bool because deploy didn't know about the one just created. Now subsequent commands (deploy, show, versions, etc.) automatically target the newly created Bool.

Changes

• src/commands/bools.js: Added writeProjectConfig() call after successful create, matching the behavior of shipit and deploy.

Testing

mkdir /tmp/test && cd /tmp/test
bool create "Test"
cat .bool/config  # ✅ {"slug": "test-xxx", "name": "Test"}
bool deploy .     # ✅ Deploys to test-xxx, not a new Bool

Fixes #5