chore(schemas,web): keep schema dist fresh and resolve types from source

Two dev-experience fixes for the stale-build-output footgun:

- schemas watch now runs `yarn build` (generate + tsc) instead of
  generate-only, so editing a schema JSON during `yarn dev` refreshes
  dist (both the .d.ts types and the runtime index.schema.js used by
  ajv), not just the generated source.
- web tsconfig maps @sourcebot/schemas/v3|v2/* to the package source,
  so type-checking and the IDE read committed source directly instead
  of stale built .d.ts. Web only imports .type files (erased at
  compile), so there is no bundling/runtime impact.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: whoisthey

packages/schemas/package.json

@@ -5,7 +5,7 @@
     "scripts": {
         "build": "yarn generate && tsc",
         "generate": "tsx tools/generate.ts",
-        "watch": "nodemon --watch ../../schemas -e json -x 'yarn generate'",
+        "watch": "nodemon --watch ../../schemas -e json -x 'yarn build'",
         "postinstall": "yarn build"
     },
     "devDependencies": {

packages/web/tsconfig.json

@@ -27,6 +27,12 @@
       ],
       "@/public/*": [
         "./public/*"
+      ],
+      "@sourcebot/schemas/v3/*": [
+        "../schemas/src/v3/*"
+      ],
+      "@sourcebot/schemas/v2/*": [
+        "../schemas/src/v2/*"
       ]
     },
     "target": "ES2017"