[RSPEED-136] Implement a basic user session management

[r0x0d]

This patch introduces a basic user session management that relies on the /etc/machine-id and the effective user id

Jira Issues:

• RSPEED-136

Checklist

• Jira issue has been made public if possible
• [RSPEED-] is part of the PR title
• PR title explains the change from the user's point of view
• Code and tests are documented properly
• The commits are squashed to as few commits as possible (without losing data)

[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
command_line_assistant/daemon/session.py	93.33%	0 Missing and 2 partials ⚠️

Files with missing lines	Coverage Δ
command_line_assistant/daemon/session.py	93.33% <93.33%> (ø)