Add the package directory to each packages package.json

- Update the repository information for each package.json to specify the directory that package is in
- Should make relative links work correctly when packages are published
- Partial deephaven#445

packages/babel-preset/package.json

@@ -2,7 +2,11 @@
   "name": "@deephaven/babel-preset",
   "version": "0.11.0",
   "description": "Deephaven Babel preset",
-  "repository": "https://github.com/deephaven/web-client-ui",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/deephaven/web-client-ui.git",
+    "directory": "packages/babel-preset"
+  },
   "author": "Deephaven Data Labs LLC",
   "license": "Apache-2.0",
   "main": "./index.js",