feat: Bump version to 1.1.0.0 and add advanced configuration options for seasonal effects

Enhanced JavaScript files for autumn, christmas, easter, fireworks, halloween, hearts, santa, snowfall, snowflakes, and snowstorm to support configuration options via window.SeasonalsPluginConfig.

Added automatic theme selection based on date in README.md.

README.md

@@ -13,13 +13,13 @@ This plugin is based on my manual mod (see the `manual` branch), which builds up
   - [Overview](#overview)
   - [Installation](#installation)
   - [Usage](#usage)
+  - [Automatic Selection Dates](#automatic-selection-dates)
   - [Build Process](#build-process)
   - [Contributing](#contributing)
   - [Legacy Manual Installation](#legacy-manual-installation)
     - [Installation](#installation-1)
-    - [Theme Settings](#theme-settings)
+    - [Usage](#usage-1)
     - [Additional Directory: Separate Single Seasonals](#additional-directory-separate-single-seasonals)
-    - [Troubleshooting](#troubleshooting)
 
 ---
 
@@ -91,6 +91,23 @@ After installation and restart:
 4.  **Save** your settings.
 5.  **Reload your browser page** (F5 or Ctrl+R) to see the changes.
 
+## Automatic Theme Selection
+If automatic selection is enabled, the following themes are applied based on the date. Specific holiday events take precedence over general seasonal themes.:
+
+| Theme | Active Period | Description |
+| :--- | :--- | :--- |
+| **`santa`** | Dec 22 – Dec 27 | Christmas theme |
+| **`fireworks`** | Dec 28 – Jan 05 | New Year's celebration |
+| **`hearts`** | Feb 10 – Feb 18 | Valentine's Day |
+| **`easter`** | Mar 25 – Apr 25 | Easter theme |
+| **`halloween`** | Oct 24 – Nov 05 | Halloween theme |
+| **`snowflakes`** | December (Remainder) | General December winter theme |
+| **`snowfall`** | January & February | General winter theme (outside of holidays) |
+| **`autumn`** | Sep, Oct, Nov | Fall theme (when not Halloween) |
+| **`none`** | All other dates | Default appearance |
+
+> **Note:** Holiday themes (like `santa` or `fireworks`) override monthly seasonal themes (like `snowflakes`).
+
 ## Build Process
 
 If you want to build the plugin yourself: