Initial release

Feature complete:

• Random String Generator: Generates a random string of specified length.
• File Upload: Uploads files to a specified directory with support for MIME type and file size validation.
• Directory Creator: Creates directories for non-existent paths.
• Directory Cleaner: Removes all files in a specified directory while preserving the directory itself.
• Slug Generator: Generates URL-safe slugs from strings.
• File Downloader: Downloads files with a specified name, forcing the browser to avoid displaying them in the browser window.
• JSON Reader: Reads JSON data from an HTTP request and decodes it into a specified struct.
• JSON Writer: Encodes data to JSON and writes it to an HTTP response.
• Post JSON with Client: Sends a JSON-encoded HTTP POST request to a remote service.