Add README for Unifont

unifont/README.md

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+# Unifont for Minetest: Full Unicode Plane 0 charset
+
+![Screenshot](screenshot.png)
+
+GNU Unifont for Font API mod (from [display_modpack](https://github.com/pyrollo/display_modpack)).
+
+- Full Unicode Basic Multilingual Plane (BMP) with 63485 characters
+- Lightweight, only 1MB in size
+- Duospaced (glyphs in either 8x16 or 16x16)
+
+Requires `font_api` mod.
+
+## Trivia
+
+- You can use Unicode fullwidth forms (U+FF01--FF5E) to display wider letters & numbers (as shown in the screenshot above)
+- GNU Unifont is also the same font used in Minecraft for Unicode display.
+
+## Copyright
+
+Copyright 2021 SyiMyuZya
+
+License: [GPL 3.0 or later](https://www.gnu.org/licenses/gpl-3.0.html)
+
+GNU Unifont: ©️ GNU Unifont authors, licensed under GPL version 2.0 or later

unifont/init.lua

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+--[[
+  Unifont for Font API
+  Copyright 2021 SyiMyuZya
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+--]]
+
 local widths = {}
 
 for i = 0,0xd7ff do