Add Config structure, TOML parser, and tests for zocket configuration

src/config/config.zig

@@ -0,0 +1,30 @@
+const Config = @import("models.zig").Config;
+
+const std  = @import("std");
+const toml = @import("toml");
+
+pub fn parse(io: std.Io, allocator: std.mem.Allocator, path: []const u8) !toml.Parsed(Config)
+{
+    var parser = toml.Parser(Config).init(allocator);
+    defer parser.deinit();
+
+    return parser.parseFile(io,path);
+}
+
+test "parse zocket config"
+{
+    var threaded: std.Io.Threaded = .init(std.testing.allocator, .{});
+    defer threaded.deinit();
+    const io = threaded.io();
+
+    const allocator = std.testing.allocator;
+
+    const parsed = try parse(io, allocator, "zocket/config.toml");
+    defer parsed.deinit();
+
+    const cfg = parsed.value;
+    try std.testing.expectEqualStrings("node-01", cfg.node.id);
+    try std.testing.expect(cfg.listen.client.enabled);
+    try std.testing.expectEqual(@as(usize, 1), cfg.mesh.peers.len);
+    try std.testing.expectEqualStrings("node-02", cfg.mesh.peers[0].id);
+}