Merge new timesketch worker PR

[hacktobeer]

Issue Type

🐛 Bug

Affected Component

openrelik-worker-timesketch

Description

Migrate timesketch PR -> openrelik/openrelik-worker-timesketch#13

Relevant Logs

[jaegeral]

• Check the Readme.md updates
• Check tests updates
• check the get_or_create_sketch() updates