Add installation instructions with pak

[maurolepore]

Relates to #69

This issue adds installation instructions with pak. The installation instructions were missing, and pak is important to ensure the system dependencies are installed smoothly.

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TODO

• [x] Link related issue/PR.
• [x] Describe the goal of the PR. Avoid details that are clear in the diff.
• [x] Mark the PR as draft.
• [ ] Include a unit test.
• [x] Review your own PR in "Files changed".
• [x] Ensure the PR branch is updated.
• [x] Ensure the checks pass.
• [x] Change the status from draft to ready.
• [x] Polish the PR title and description.
• [x] Assign a reviewer.

EXCEPTIONS

• [ ] Slide here any item that you intentionally choose to not do.