[FEATURE] Add Hcesar layout

[davidzx84]

Problem / Use Case
Hcesar layout is available on Simple keyboard and Fossify keyboard but not on Urik keyboard. Its optimized for Portuguese language (250M+ people) with same principles as Dvorak.

Proposed Solution
Add Hcesar layout

Privacy Consideration
Confirm this feature respects privacy-first principles (no network calls, no analytics, no data collection)

Additional Context (optional)

Layout: hcesar.json