[BUG] SDK: tests fail in `@defai/element-types` & repo includes `node_modules`

[maclorlando]

Summary

While setting up and auditing the SDK repo, I found two issues:

• @defai/element-types failed its test script because it lacked a tsconfig.json.
• The repository included node_modules/ and lacked proper .gitignore rules.

Steps to Reproduce

1️⃣ Clone the repo
2️⃣ Run:

npm install
npm test

3️⃣ Observe:

× @defai/element-types:test
…and note that node_modules/ is checked into version control.

Fixes Implemented (see PR #2)
✅ Added tsconfig.json to types/ to allow tsc --noEmit to pass.
✅ Added /node_modules to .gitignore.
✅ Removed node_modules/ from the repo.

Results
✅ npm install, npm run build, and npm test now all succeed.
✅ All 6 packages pass tests.
✅ .gitignore properly excludes node_modules/.