chore: initial studio-theme-accessibility 0.1.0

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

MODULE.md

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+# accessibility
+
+WCAG AA high-contrast Studio theme.
+
+This is one of F∆I Studio's bundled theme plugins. When
+installed, it appears in **Settings → Themes** alongside the
+built-in light and dark themes. Select it and the entire
+Studio UI re-themes immediately — no restart required.
+
+## When to pick this theme
+
+- Operators with low vision or colour-vision deficiency
+- Bright-sunlight outdoor / kiosk deployments
+- Any deployment where the public sector's accessibility
+  rules demand a verified high-contrast option
+
+Every foreground/background pair meets WCAG 2.2 AA
+(≥ 4.5:1 for normal text); on-surface pairs hit AAA. Pure
+black + pure white surfaces; deep-navy or sky-blue
+primary depending on brightness.