refactor(shared): keep cache-paths internal (drop public subpath export)

The cache-path resolvers are an internal monorepo helper, not part of the
shared package's public API. The previous commit exposed them as a
"./cli/commands/cache-paths" export (a side effect of adding a tsdown entry,
which makes the exports plugin generate the mapping) — leaking shared's
internal file layout for no benefit.

appkit resolves the import via its tsconfig `paths` alias and bundles shared
inline (noExternal), so the export is not load-bearing: dropping the tsdown
entry (and thus the generated export) keeps typecheck, appkit build, vitest,
and docs:build all green. shared stays private; cache-paths stays internal.

xavier loop: iteration 7 -- keep cache-paths internal

Co-authored-by: Isaac
Signed-off-by: Atila Fassina <atila@fassina.eu>

Author: atilafassina

packages/shared/package.json

@@ -15,10 +15,6 @@
       "development": "./src/cli/index.ts",
       "default": "./dist/cli/index.js"
     },
-    "./cli/commands/cache-paths": {
-      "development": "./src/cli/commands/cache-paths.ts",
-      "default": "./dist/cli/commands/cache-paths.js"
-    },
     "./package.json": "./package.json"
   },
   "scripts": {
@@ -39,7 +35,6 @@
     "exports": {
       ".": "./dist/index.js",
       "./cli": "./dist/cli/index.js",
-      "./cli/commands/cache-paths": "./dist/cli/commands/cache-paths.js",
       "./package.json": "./package.json"
     }
   },

packages/shared/tsdown.config.ts

@@ -2,15 +2,7 @@ import { defineConfig } from "tsdown";
 
 export default defineConfig({
   name: "shared",
-  entry: [
-    "src/index.ts",
-    "src/cli/index.ts",
-    // Node-only path resolvers, exposed as the "shared/cache-paths" subpath so
-    // appkit can import them without pulling node: builtins into the
-    // client-safe root barrel. Must be a tsdown entry or the exports plugin
-    // (exports.devExports below) drops the "./cache-paths" export on rebuild.
-    "src/cli/commands/cache-paths.ts",
-  ],
+  entry: ["src/index.ts", "src/cli/index.ts"],
   outDir: "dist",
   minify: false,
   format: "esm",