Add missing member list to File System API

[skyclouds2001]

Description

add missing extensions list to File System API
remove the browser compatibility table from guide
correct APIRef call for DataTransferItem.getAsFileSystemHandle()
some other typo fix

Motivation

Additional details

Related issues and pull requests

relates to mdn/translated-content#19988

[github-actions]

Preview URLs

• /en-US/docs/Web/API/DataTransferItem/getAsFileSystemHandle
• /en-US/docs/Web/API/File_System_API/Origin_private_file_system
• /en-US/docs/Web/API/File_System_API
• /en-US/docs/Web/API/StorageManager/getDirectory

External URLs (6)

URL: /en-US/docs/Web/API/File_System_API
Title: File System API

• https://developer.chrome.com/docs/capabilities/web-apis/file-system-access (1 time) (Note! This may be a new URL 👀)
• https://web.dev/articles/origin-private-file-system (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/File_System_API/Origin_private_file_system
Title: Origin private file system

• https://developers.google.com/safe-browsing (1 time)
• https://web.dev/articles/origin-private-file-system (1 time)
• https://wicg.github.io/file-system-access/ (1 time)
• https://www.sqlite.org/wasm (1 time)

[teoli2003]

👍