Constrain Omawrite's save dialog

[yashranaway]

Keeps Omawrite's save dialog inside scaled laptop displays. Fixes #9046.

<<<< AI wording below >>>>

Problem

Omawrite can create a 1231x950 save dialog on a 1280x832 logical display, clipping its title and action controls beyond the monitor work area.

Fix

Match only Omawrite's Save File window and apply the reporter-validated floating, centered 875x600 geometry.

Verification

• bash -n test/shell.d/omawrite-window-rule-test.sh
• git diff --check
• The semantic Lua test checks the emitted class, title, float, center, and size properties.
• The focused test cannot run here because lua is not installed.
• Live verification at 2x scale is pending, so this PR is a draft.

[yuzuwoeser]

Thanks for looking into this. The 875x600 rule was only a workaround tested on my display, so I’m unsure it should become the default fix for everyone. Treat this as a mitigation and investigate the sizing issue in Omawrite/Qt instead?

[yashranaway]

Agreed, 875x600 is too display-specific, so I am moving this fix into Omawrite's file-dialog implementation.

[yashranaway]

Replaced by omacom/omawrite#39, which fixes the dialog in Omawrite instead of applying a display-specific Hyprland rule.