Merge twenty-cli into twenty-sdk (#16150)

- Moves twenty-cli content into twenty-sdk
- add a new twenty-sdk:0.1.0 version
- this new twenty-sdk exports a cli command called 'twenty' (like
twenty-cli before)
- deprecates twenty-cli
- simplify app init command base-project
- use `twenty-sdk:0.1.0` in base project
- move the "twenty-sdk/application" barrel to "twenty-sdk"
- add `create-twenty-app` package

<img width="1512" height="919" alt="image"
src="https://github.com/user-attachments/assets/007bef45-4e71-419a-9213-cebed376adbf"
/>

<img width="1506" height="929" alt="image"
src="https://github.com/user-attachments/assets/3de2fec6-1624-4923-ae13-f4e1cf165eb5"
/>

packages/create-twenty-app/src/cli.ts

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+import chalk from 'chalk';
+import { Command, CommanderError } from 'commander';
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import { CreateAppCommand } from './create-app.command';
+
+const packageJson = JSON.parse(
+  readFileSync(join(__dirname, '../package.json'), 'utf-8'),
+);
+
+const program = new Command(packageJson.name)
+  .description('CLI tool to initialize a new Twenty application')
+  .version(
+    packageJson.version,
+    '-v, --version',
+    'Output the current version of create-twenty-app.',
+  )
+  .argument('[directory]')
+  .helpOption('-h, --help', 'Display this help message.')
+  .action(async (directory?: string) => {
+    if (directory && !/^[a-z0-9-]+$/.test(directory)) {
+      console.error(
+        chalk.red(
+          `Invalid directory "${directory}". Must contain only lowercase letters, numbers, and hyphens`,
+        ),
+      );
+      process.exit(1);
+    }
+    await new CreateAppCommand().execute(directory);
+  });
+
+program.exitOverride();
+
+try {
+  program.parse();
+} catch (error) {
+  if (error instanceof CommanderError) {
+    process.exit(error.exitCode);
+  }
+  if (error instanceof Error) {
+    console.error(chalk.red('Error:'), error.message);
+    process.exit(1);
+  }
+}