v0.1.0 - Core Theme: patterns, dark mode, block styles, style variations

- Add 16 block patterns across 7 new categories (hero, features, CTA,
  testimonials, pricing, contact, text)
- Add dark mode toggle with localStorage persistence and system preference
  detection (Bootstrap 5.3 data-bs-theme)
- Register 17 custom block styles mapping Bootstrap components to WordPress
  blocks (cards, alerts, tables, buttons, etc.)
- Add 4 style variations: Ocean, Forest, Sunset, Midnight
- Add sidebar template part and "Blog with Sidebar" custom template
- Add Inter and Lora variable fonts with fontFace declarations
- Add Display font size (fluid 2.5rem-3.5rem)
- Update translations (en_US .pot, de_CH .po) with all new strings
- Bump version to 0.1.0

Co-Authored-By: Claude <noreply@anthropic.com>

src/scss/_custom.scss

@@ -1,2 +1,59 @@
 // Custom theme styles
 // Add theme-specific styles here that go beyond Bootstrap defaults
+
+// Dark mode toggle button
+.wp-bootstrap-dark-mode-toggle {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    background: none;
+    border: none;
+    cursor: pointer;
+    padding: 0.375rem;
+    color: currentColor;
+    line-height: 1;
+    transition: opacity 0.15s ease-in-out;
+
+    &:hover {
+        opacity: 0.75;
+    }
+
+    &:focus-visible {
+        outline: 2px solid currentColor;
+        outline-offset: 2px;
+        border-radius: 0.25rem;
+    }
+}
+
+// Dark mode overrides for block styles with hardcoded colors
+[data-bs-theme="dark"] {
+    .is-style-alert-info {
+        background-color: #032830;
+        border-color: #055160;
+        color: #6edff6;
+    }
+
+    .is-style-alert-success {
+        background-color: #051b11;
+        border-color: #0a3622;
+        color: #75b798;
+    }
+
+    .is-style-alert-warning {
+        background-color: #332701;
+        border-color: #664d03;
+        color: #ffda6a;
+    }
+
+    .is-style-alert-danger {
+        background-color: #2c0b0e;
+        border-color: #58151c;
+        color: #ea868f;
+    }
+
+    .is-style-card,
+    .is-style-card-shadow {
+        border-color: $gray-600;
+        background: var(--bs-body-bg);
+    }
+}