Limit opened file size

[shahar-h]

Description

Currently there is no limit to opened files size. as a result, when opening a huge file it could lead to out of memory issues.

Reproduction Steps

• Create a file with 1GB random text data via terminal:
  openssl rand -base64 $((1024*1024*1024)) >> large.out
• Open the file via file explorer.
• As a result, Theia main process reaches ~1.5GB memory, which could lead to out of memory issues on hosted environments with limited memory.

When trying the same in vscode the following error message appears:

[vince-fugnitto]

@shahar-h thank you for the issue!
At the moment, we already have an existing issue tracking the feature #4731. I will close this one as it's a duplicate.