Document uppercase pitch feedback for Wine typing

Explain that Wine Access preserves character case in accepted editor
insertion events and that the matching Cthulhu-Go reader selects the
configured uppercase voice and pitch. Lowercase feedback returns to the
normal character voice; the helper itself does not set speech pitch.

Extend the live Notepad acceptance procedure with AaÉé to check ASCII and
accented capitals, immediate lowercase pitch restoration, custom character
echo voices, and preservation of character case on braille displays.

The reader implementation and automated regressions are committed separately
in cthulhu-go as b45f84f (Use uppercase character voices for Wine typing echo).
This Wine Access commit changes documentation only.

Validation: reviewed both Markdown diffs and passed git diff --check.
Live listening and physical braille acceptance remain separate checks. The
previous helper build passed, but its GUI fixtures could not run because
Xvfb and xvfb-run are unavailable.

README.md

@@ -218,6 +218,10 @@ pairs. Typing over selected text also reports the inserted character. Password
 fields, background controls and rejected input remain silent. Paste and
 programmatic text changes do not generate character echo. The reader presents
 these through the same feedback path as caret navigation and Backspace.
+Character case is preserved. Cthulhu-Go uses its configured uppercase voice
+and pitch for capital-letter feedback, then the normal character voice for
+lowercase letters. This requires the matching reader update; the helper does
+not set speech pitch itself.
 
 Editor actions use `PresentAccessibleEvent` with event type `text`; actual focus
 uses `focus`. Cthulhu-Go must include the corresponding editor-event support so