refactor: remove void keyword from code handlers and documentation

[Savageman]

It seems they are many questions related to the usage of the void keyword, and it was suggested to raise a PR to remove them here: #484 (comment)

This is my 1st contribution, I attempted to follow the guidelines and specifically the Commit messages conventions

However I'm not familiar with the stack (pnpm / ts), so I'm trusting the CI to detect any issue. Please double-check carefully too :)

[nx-cloud]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit e1562f9. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

---

✅ Successfully ran 2 targets

• nx affected --targets=test:format,test:sherif,test:knip,test:eslint,test:lib,test:types,test:build,build --parallel=3
• nx run-many --targets=test:format,test:sherif,test:knip,test:eslint,test:lib,test:types,test:build,build --parallel=3

---

Sent with 💌 from NxCloud.

[crutchcorn]

LGTM! Great work, thanks!