Berry 'path.listdir(file.tapp#)' to list directory inside '.tapp' archives

[s-hadinger]

Description:

Berry, add ability to list the files in a ".tapp" archive with path.listdir().

Example:

import path
var files = path.listdir("/.extensions/Leds_Panel.tapp#")
print(files)
# ['autoexec.be', 'leds_panel.be', 'manifest.json']

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.9
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass