docs: create readme

Author: ok-coder1

README.md

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+# Matrix Blocks
+This mod adds blocks with green 1s and 0s to your game :3. \
+This can be useful to decorate your creations (if you like computers) and I plan to add functional computers and smartphones sometime in the near future.
+
+# What it adds
+Blocks, stairs, slabs, buttons, pressure plates and more! Try it out!
+
+# Requirements
+- Minecraft
+  - 1.20.4
+  - 1.20.5
+  - 1.20.6
+- Fabric API
+- Fabric Loader
+
+### NEEDS TO BE INSTALLED ON SERVER AND CLIENT
+
+###### This was made for Hackcraft XD.