Setting up Rollow definition in my userspace

- I know I can't build a firmware with the files here but I rather keep
them here over maintaining a qmk_firmware fork or creating a new repo
- Added the basic keyboard definition files
- Copied the Readme template from the website which is based on planck
- started populating info.json, taking inspiration from swoop/crkbd
- decided to omit the rev1 folder for now to simplify things

keyboards/barbellboards/rollow/info.json

@@ -0,0 +1,19 @@
+{
+	"keyboard_name": "Rollow",
+	"manufacturer": "BarbellBoards",
+	"url": "https://www.barbellboards.com/product/rollow",
+	"maintainer": "t4corun",
+	"usb": {
+		"pid": "0x5257",
+		"vid": "0x4242",
+		"device_version": "1.0.0"
+	},
+    "matrix_pins": {
+        "cols": [ "F4", "F5", "F6", "F7", "B1", "B3" ],
+        "rows": [ "D4", "C6", "D7", "E6" ]
+    },
+	"diode_direction": "COL2ROW",
+    "split": {
+        "enabled": true
+    },		
+}