Similar to about:config from firefox. All preferences are editable;
editing them mid-runtime is not guaranteed to cause any effects. This is
separate from servo:preferences, which selectively groups and exposes
preferences. This probably would become more useful if/when preferences
become persistent.
<img width="1136" height="880" alt="Screenshot 2025-10-31 at 10 19
57 PM"
src="https://github.com/user-attachments/assets/2ef759d8-06a4-457f-b9df-331cc3525338"
/>
Followup work:
- Remove `getStringPreference`, `getIntPreference`, and
`getBoolPreference`. Using `getPreference` and `preferenceType` is more
flexible.
- Make more of these config options work on the fly.
- Allow for reverting config options.
---------
Signed-off-by: Ashwin Naren <arihant2math@gmail.com>
