feat(linux): add os info

src/linux/linux.zig

@@ -208,3 +208,27 @@ pub fn getKernelInfo(allocator: std.mem.Allocator) !KernelInfo {
         .kernel_release = try allocator.dupe(u8, &uts.release),
     };
 }
+
+pub fn getOsInfo(allocator: std.mem.Allocator) ![]u8 {
+    const os_release_path = "/etc/os-release";
+    const file = try std.fs.cwd().openFile(os_release_path, .{});
+    defer file.close();
+    const os_release_data = try file.readToEndAlloc(allocator, std.math.maxInt(usize));
+    defer allocator.free(os_release_data);
+
+    var pretty_name: ?[]const u8 = null;
+
+    var lines = std.mem.split(u8, os_release_data, "\n");
+    while (lines.next()) |line| {
+        if (std.mem.startsWith(u8, line, "PRETTY_NAME")) {
+            var parts = std.mem.split(u8, line, "=");
+            _ = parts.next(); // discard the key
+            if (parts.next()) |value| {
+                pretty_name = std.mem.trim(u8, value, "\"");
+                break;
+            }
+        }
+    }
+
+    return try allocator.dupe(u8, pretty_name orelse "Unknown");
+}