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.

tests/README.md

@@ -429,6 +429,9 @@ Close existing Notepad windows after saving any work so the updated hook can loa
    character, including both `l` characters, spaces and the line break. Standard
    Edit typing uses the reader's editor feedback path. Check typing over selected
    text too, and confirm password fields never announce their typed contents.
+   Type `AaÉé`: capitals should use Cthulhu's uppercase pitch, with normal pitch
+   restored for each lowercase letter. Repeat with a custom character echo voice
+   if configured, and confirm braille preserves the original case.
 4. Press Ctrl+Home, then Right three times. Expect the first line at Ctrl+Home,
    then `e`, `l`, `l`. Both repeated letters should produce feedback. Ctrl+Right
    should read `beta`; Down should read `second line`.