chore: extract ShareServer into its own repository

Move the existing Hono API, React console, tests, build configuration,
and feature documentation from GoodBuddy into a standalone project.
Keep the current interactive-prototype behavior and production limitations.

Document the source commit and sibling-checkout links to the authoritative
Desktop network architecture. Independent install, tests, typecheck, lint,
build, and built-service HTTP smoke checks passed.

eslint.config.js

@@ -0,0 +1,33 @@
+import js from '@eslint/js'
+import reactHooks from 'eslint-plugin-react-hooks'
+import globals from 'globals'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: ['build-server/**', 'dist/**', 'node_modules/**']
+  },
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    files: ['src/**/*.{ts,tsx}'],
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.vitest
+      }
+    },
+    plugins: {
+      'react-hooks': reactHooks
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules
+    }
+  },
+  {
+    files: ['server/**/*.ts'],
+    languageOptions: {
+      globals: globals.node
+    }
+  }
+)