[FEATURE REQUEST] Add basic editing for text files

[hosy]

Text files should be editable

Steps to reproduce

1. Open text file

Expected behaviour

Text content should be editable inside the app

Actual behaviour

File content is preview only

Client

iOS version:
12.1.4

ownCloud app version:
1.0.0 build 111

[michaelstingl]

@hosy is working on a POC:

• based on a popular library https://github.com/simonbs/Runestone

[stackByte]

Sounds like a pretty basic feature that MUST be available. This surely will add to the productivity capability. If there's a vote, I would put my hand up for it.