docs: add MODULE.md + MODULE.de.md inline docs

Studio's Documentation section now populates from the bundle
instead of staying empty. Same content as the existing
README, trimmed for the in-app reader.

Signed-off-by: flemming-it <sf@flemming.it>

MODULE.de.md

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+# studio.theme.solarized
+
+Theme-Hook-Plugin für F∆I Studio. Liefert Ethan Schoonovers
+[Solarized](https://ethanschoonover.com/solarized/)-Palette
+als Material-3-ColorScheme-Paar (Light + Dark).
+
+## Capability
+
+- `studio.theme.solarized@0.1.0`
+
+## Implementierter Hook
+
+- `theme(brightness) -> color-scheme`
+
+Die anderen beiden Studio-Plugin-Hooks (`translate`,
+`output-view`) liefern `PluginError::Declined` — dieses
+Plugin macht nur Themes.
+
+## Ausgabe
+
+14 ARGB-Tokens pro Brightness in Material-3-Reihenfolge
+(primary → on-primary → secondary → … → outline-variant).
+Andere Brightness-Werte als `"light"` oder `"dark"` liefern
+`PluginError::Declined`.
+
+## Berechtigungen
+
+Keine. Reines Konstanten-Lookup, kein I/O.
+
+## Build
+
+```bash
+cargo build --release --target wasm32-wasip2
+# Ausgabe: target/wasm32-wasip2/release/studio_theme_solarized.wasm
+```

MODULE.md

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+# studio.theme.solarized
+
+Theme-hook plugin for F∆I Studio. Ships Ethan Schoonover's
+[Solarized](https://ethanschoonover.com/solarized/) palette as
+a Material 3 ColorScheme pair (Light + Dark).
+
+## Capability
+
+- `studio.theme.solarized@0.1.0`
+
+## Hook implemented
+
+- `theme(brightness) -> color-scheme`
+
+The other two Studio-plugin hooks (`translate`, `output-view`)
+return `PluginError::Declined` — this plugin only themes.
+
+## Output
+
+14 ARGB tokens per brightness in Material 3 order
+(primary → on-primary → secondary → … → outline-variant).
+Brightness names other than `"light"` or `"dark"` return
+`PluginError::Declined`.
+
+## Permissions
+
+None. The plugin is a pure constant lookup — no I/O.
+
+## Build
+
+```bash
+cargo build --release --target wasm32-wasip2
+# Output: target/wasm32-wasip2/release/studio_theme_solarized.wasm
+```