Updated documentation

- In general, the README should be more clean and concise
- Moved building section to seperate file (doesn't include set up page)
- Added contributing section in REMADE
- Updated license section in README
- Added config file and struct for later use

src/config.zig

@@ -0,0 +1,10 @@
+pub const Branding = struct {
+    logo: []const u8,
+    background: []const u8,
+};
+
+pub const Config = struct {
+    height: i64,
+    width: i64,
+    branding: *Branding,
+};