feat: read user input

src/01_lexic/root.zig

@@ -0,0 +1,3 @@
+pub fn stub() i32 {
+    return 322;
+}

src/main.zig

@@ -1,4 +1,6 @@
 const std = @import("std");
+const lexic = @import("./01_lexic/root.zig");
+
 const thp_version: []const u8 = "0.0.0";
 
 pub fn main() !void {
@@ -13,8 +15,18 @@ fn repl() !void {
     var bw = std.io.bufferedWriter(stdout_file);
     const stdout = bw.writer();
     try stdout.print("The THP REPL, v{s}\n", .{thp_version});
-    try stdout.print("Enter expressions to evaluate. Enter CTRL-D to exit.\n", .{});
+    try stdout.print("Enter expressions to evaluate. Enter CTRL-D to exit.\n\n", .{});
+    try bw.flush();
 
+    const stdin = std.io.getStdIn().reader();
+
+    try stdout.print("thp => ", .{});
+    try bw.flush();
+
+    const user_input = try stdin.readUntilDelimiterAlloc(std.heap.page_allocator, '\n', 8192);
+    defer std.heap.page_allocator.free(user_input);
+
+    try stdout.print("got: `{s}`\n", .{user_input});
     try bw.flush();
 }
 
@@ -24,3 +36,8 @@ test "simple test" {
     try list.append(42);
     try std.testing.expectEqual(@as(i32, 42), list.pop());
 }
+
+test "new test" {
+    const res = lexic.stub();
+    try std.testing.expectEqual(@as(i32, 322), res);
+}