feat: remove Flow types support

Removed Flow configuration, type definitions, and dependencies.
- Deleted .flowconfig
- Deleted flow-typed/ and typings/ directories
- Removed Flow-related scripts and dependencies from package.json
- Removed Flow preset from babel.config.js
- Removed Flow ignore from eslint.config.mjs

Author: mdjastrzebski

.flowconfig

@@ -12,7 +12,6 @@ module.exports = {
     ],
     '@babel/preset-react',
     '@babel/preset-typescript',
-    '@babel/preset-flow',
   ],
   plugins: ['@babel/plugin-transform-strict-mode'],
   env: {

babel.config.js

@@ -5,14 +5,7 @@ import jest from 'eslint-plugin-jest';
 
 export default [
   {
-    ignores: [
-      'flow-typed/',
-      'build/',
-      'experiments-rtl/',
-      'website/',
-      'eslint.config.mjs',
-      'jest-setup.ts',
-    ],
+    ignores: ['build/', 'experiments-rtl/', 'website/', 'eslint.config.mjs', 'jest-setup.ts'],
   },
   ...callstackConfig,
   ...tseslint.configs.strict,