Fix types declaration entry path for clients/js

[clankmaxxing-clod]

Problem

clients/js (@solana-program/token-wrap) ships no usable type declarations. package.json declares:

"types": "./dist/types/index.d.ts",
"exports": { ".": { "types": "./dist/types/index.d.ts", ... } }

…but pnpm build actually emits the entry to ./dist/types/**src**/index.d.ts. The declared path doesn't exist and there is no co-located .d.ts next to the JS (declarations use emitDeclarationOnly + declarationDir), so TypeScript consumers resolve nothing.

@arethetypeswrong/cli before:

resolution	result
node10	❌ No types
node16 (from CJS)	❌ No types
node16 (from ESM)	❌ No types
bundler	❌ No types

Cause

tsconfig.json had include: ["src", "*.ts"]. The *.ts glob matches tsup.config.ts in the package root, which raises the computed declaration rootDir to the package directory — so every emitted declaration gets an extra src/ path segment (dist/types/src/index.d.ts, plus a stray dist/types/tsup.config.d.ts).

Fix

Pin the declaration root to src and stop compiling the root-level config file into the declaration output:

-        "emitDeclarationOnly": true
+        "emitDeclarationOnly": true,
+        "rootDir": "src"
     },
     "extends": ["@tsconfig/strictest/tsconfig.json"],
-    "include": ["src", "*.ts"]
+    "include": ["src"]

Now tsc emits the entry to the declared ./dist/types/index.d.ts (and drops the stray tsup.config.d.ts). The JS build (tsup) is unchanged.

@arethetypeswrong/cli after:

resolution	result
node10	🟢
node16 (from CJS)	🟢
node16 (from ESM)	🎭 Masquerading as CJS
bundler	🟢

Note on the remaining 🎭

The single emitted dist/types/index.d.ts is CJS-flavored (the package is "type": "commonjs"), so an ESM consumer sees a CJS-shaped declaration for the .mjs entry. This is a pre-existing, much milder issue (it was masked by the "No types" failure) and is common to the tsc-single-.d.ts build style used across these clients. Fully resolving it needs a dual .d.ts/.d.mts declaration setup, which is a broader build change; I've kept this PR to the critical fix (consumers now actually get types). Happy to follow up on the dual-declaration setup if desired.

Verification

pnpm build succeeds; dist/types/index.d.ts exists with the full public API; pnpm lint / pnpm format:check unaffected (no source changes).

🤖 Generated with Claude Code