Adding --inline-settings option to srt for passing config as json string

[dileepyavan]

Enable --inline-settings option to pass the json string. If these settings are dynamic enough to change frequently in a session, it would be optimal to read it from an inline string than a physical file.

This improves security as multiple processes reading files while updates are being made will cause race conditions which impacts overall sandboxing functionality.

[dileepyavan]

Looking for your feedback on this PR. We would like to maintain the settings in memory.

[hwittenborn]

What's the benefit vs just writing to a temp file? Curious for my own use cases as well.

I would love the ability to modify the sandbox permissions while running, though I haven't thought a ton about that implementation quite yet.

[dileepyavan]

For our scenario, we already have these stored as settings in another file and need to build the config based on these settings. Instead of creating another config, reading and storing in-memory is easy to maintain and easy to provide isolation per process without the overhead of file maintenance operations.

[dileepyavan]

This improves security as multiple processes reading files while updates are being made will cause race conditions which can impact overall sandboxing functionality.