refactor: simplify frontend theme setup

frontend/src/plugins/theme.js

@@ -0,0 +1,29 @@
+export const socializeTheme = {
+    dark: false,
+    colors: {
+        background: '#f4f6f3',
+        'on-background': '#172033',
+        surface: '#fbfaf6',
+        'surface-muted': '#f1f5f2',
+        'on-surface': '#172033',
+        control: '#eef3ef',
+        'control-hover': '#e7eee9',
+        'control-focus': '#ffffff',
+        border: '#c7d2cc',
+        'border-strong': '#94a39d',
+        primary: '#172033',
+        'on-primary': '#fbfaf6',
+        secondary: '#fff3e2',
+        'on-secondary': '#172033',
+        tertiary: '#d9f6ee',
+        'on-tertiary': '#0f766e',
+        accent: '#ff8a3d',
+        'accent-strong': '#ef4444',
+        highlight: '#2fa58d',
+        error: '#bc2f2f',
+        'on-error': '#ffffff',
+        info: '#2563eb',
+        success: '#2fa58d',
+        warning: '#b45309',
+    },
+};