Initial commit, added config doc for VSCodium

vscodium/README.md

+# VSCodium
+
+## How to add C code formatter?
+
+Install the `clang-format` tool.
+
+On Ubuntu:
+```
+sudo apt-get install clang-format
+```
+
+Download the `Clang-format` VSCode extension here (`.vsix`): [https://marketplace.visualstudio.com/items?itemName=xaver.clang-format](https://marketplace.visualstudio.com/items?itemName=xaver.clang-format).
+
+In VSCodium:
+
+1. Click on the "Extensions" icon in the left panel
+1. Click on the "..." at the top right of the extension tab
+1. Select "Install from VSIX..." and select the `.vsix` file downloaded above
+
+The extension is now installed and selected C code can be formatted using the "ctrl+shift+i" key combination!
+
+## How to preview a markdown (`.md`) file?
+
+Press "ctrl+alt+v"
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