Add Nepali Date desklet (#1820)

* Add Nepali Date desklet

* Compliance: Remove icon from metadata and add mandatory icon.png

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Co-authored-by: khumnath <nath.khumnath@gmail.com>

Author: khumnath

nepali-date@khumnath/README.md

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+# Nepali Date Desklet
+
+A premium Bikram Sambat (Nepali) calendar desklet for Linux Mint Cinnamon.
+
+## Features
+- **Accurate Conversion**: Supports date conversion between Gregorian (AD) and Bikram Sambat (BS) from 2000 to 2089 BS.
+- **Glassmorphism Design**: Modern, semi-transparent background with backdrop blur.
+- **Dual Views**: Click the widget to toggle between a large **Daily View** and a full **Monthly Calendar View**.
+- **Settings Integration**: Fully configurable via the Cinnamon Desklets menu:
+  - Toggle between Nepali and English numerals.
+  - Show/Hide Gregorian date.
+  - Show/Hide Today's Date title.
+  - Change colors, font size, and default view mode.
+
+## Installation
+1. Open a terminal in this directory.
+2. Run the installer:
+   ```bash
+   ./install.sh
+   ```
+3. Right-click on your desktop -> **Add Desklets**.
+4. Find **Nepali Date**, select it, and click **Add to desktop**.
+
+## Credits
+- Developed by Khumnath CG.
+- Based on Nepali calendar astronomical logic.

nepali-date@khumnath/files/nepali-date@khumnath/credits.txt

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+Nepali Date Desklet Credits
+==========================
+
+Developer:
+khumnath cg
+
+UI Inspiration:
+- nepalipatro@deeppradhan
+- Apple iOS Glassmorphism
+
+Special Thanks:
+- Cinnamon Desktop Team.
+- Linux Mint Community.
+
+Version: 1.2.0
+Release Date: April 2026