Add exit call for insufficient arguments in Zig main function

- Implemented std.process.exit(1) to terminate the program when fewer than 3 arguments are provided.
- Ensured proper usage message is displayed before exiting.

Author: andy1li

compiled_starters/zig/src/main.zig

@@ -13,6 +13,7 @@ pub fn main() !void {
 
     if (args.len < 3) {
         std.debug.print("Usage: {s} <database_file_path> <command>\n", .{args[0]});
+        std.process.exit(1);
     }
 
     const database_file_path: []const u8 = args[1];

solutions/zig/01-dr6/code/src/main.zig

@@ -13,6 +13,7 @@ pub fn main() !void {
 
     if (args.len < 3) {
         std.debug.print("Usage: {s} <database_file_path> <command>\n", .{args[0]});
+        std.process.exit(1);
     }
 
     const database_file_path: []const u8 = args[1];

solutions/zig/01-dr6/diff/src/main.zig.diff

@@ -1,4 +1,4 @@
-@@ -1,36 +1,32 @@
+@@ -1,37 +1,33 @@
  const std = @import("std");
  var stdout_buffer: [1024]u8 = undefined;
  var stdout_writer = std.fs.File.stdout().writer(&stdout_buffer);
@@ -14,6 +14,7 @@
 
      if (args.len < 3) {
          std.debug.print("Usage: {s} <database_file_path> <command>\n", .{args[0]});
+         std.process.exit(1);
      }
 
      const database_file_path: []const u8 = args[1];

starter_templates/zig/code/src/main.zig

@@ -13,6 +13,7 @@ pub fn main() !void {
 
     if (args.len < 3) {
         std.debug.print("Usage: {s} <database_file_path> <command>\n", .{args[0]});
+        std.process.exit(1);
     }
 
     const database_file_path: []const u8 = args[1];