feat(docs): add Chinese and English documentation for Mingling tutorials

Add comprehensive documentation covering Declare a Dispatcher, Declare a
Chain, Rendering Results, Multi-Command Program, Argument Parsing with
Picker and Clap, Program Setup, Error Handling, Help Info, Resource
System, Exit Code Control, Hook System, Testing, Completion, Structural
Rendering, and Core Concepts

1 files changed, 69 insertions, 0 deletions

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+<h1 align="center">Help Info</h1>
+<p align="center">
+    Adding --help support to commands
+</p>
+
+A CLI without help info is not a good CLI.
+
+In Mingling, use the `#[help]` macro to add help text to commands.
+
+## Simplest Help
+
+Write a help function directly for an Entry:
+
+```rust
+@@@use mingling::macros::help;
+@@@dispatcher!("greet", CMDGreet => EntryGreet);
+#[help]
+fn help_greet(_entry: EntryGreet) {
+    r_println!("Usage: greet [name]");
+    r_println!("Say hello to someone.");
+}
+```
+ 
+> [!NOTE]
+> Help functions also use `r_println!`, because `#[help]` follows the rendering pipeline — it's a short-circuit render triggered early by the `--help` flag, not logic outside the pipeline.
+
+## Global Help
+
+You can also write help for `ErrorDispatcherNotFound` as the "root help":
+
+```rust
+@@@use mingling::macros::help;
+// Triggered when user passes --help directly
+#[help]
+fn help_root(entry: ErrorDispatcherNotFound) {
+    r_println!("Usage: my-cli <command>");
+    r_println!("Commands:");
+    r_println!("  greet    Say hello");
+}
+```
+ 
+> [!TIP]
+> `ErrorDispatcherNotFound` is a type generated by `gen_program!()`, representing "no matching command found." Writing `#[help]` for it adds help to the program's root command.
+
+## Requires Setup
+
+For `--help` to work properly, add `BasicProgramSetup` in `main`:
+
+```rust
+@@@use mingling::macros::help;
+@@@use mingling::setup::BasicProgramSetup;
+@@@dispatcher!("greet", CMDGreet => EntryGreet);
+fn main() {
+    let mut program = ThisProgram::new();
+    program.with_setup(BasicProgramSetup);
+    program.with_dispatcher(CMDGreet);
+    program.exec_and_exit();
+}
+```
+ 
+`BasicProgramSetup` includes `HelpFlagSetup`, which simply sets `program.user_context.help` to `true`.
+
+The actual routing to the `#[help]` function is handled by code generated via `gen_program!()` — it checks this flag during dispatch, and if `true`, goes through the help rendering path, bypassing the Chain.
+
+Without `BasicProgramSetup`, `--help` is treated as a normal argument and passed as input to the Entry's Chain.
+
+<p align="center" style="font-size: 0.85em; color: gray;">
+    Written by @Weicao-CatilGrass
+</p>