docs: migrate renderer examples to buffer macro and update docs

Update all documentation and code examples to use the new
`#[renderer(buffer)]`
pattern with `r_println!` instead of manually constructing
`RenderResult`
with `writeln!`.

1 files changed, 8 insertions, 10 deletions

diff --git a/docs/pages/advanced/2-structural-renderer.md b/docs/pages/advanced/2-structural-renderer.md
index 910b197..b54af22 100644
--- a/docs/pages/advanced/2-structural-renderer.md
+++ b/docs/pages/advanced/2-structural-renderer.md
@@ -27,6 +27,7 @@ After enabling `StructuralRendererSetup`, use `pack_structural!` instead of `pac
 // Features: ["structural_renderer"]
 // Dependencies:
 // serde = "1"
+@@@use mingling::macros::buffer;
 @@@use mingling::setup::StructuralRendererSetup;
 @@@dispatcher!("render", CMDRender => EntryRender);
  
@@ -40,11 +41,9 @@ fn handle_render(args: EntryRender) -> Next {
     ResultInfo::new((name, age)).into()
 }
  
-#[renderer]
-fn render_info(r: ResultInfo) -> RenderResult {
-    let mut result = RenderResult::new();
-    writeln!(result, "{:?}", *r).ok();
-    result
+#[renderer(buffer)]
+fn render_info(r: ResultInfo) {
+    r_println!("{:?}", *r);
 }
 ```
  
@@ -68,6 +67,7 @@ The default output from `pack_structural!` includes an `inner` field. For full c
 // Features: ["structural_renderer"]
 // Dependencies:
 // serde = "1"
+@@@use mingling::macros::buffer;
 @@@use mingling::prelude::*;
 @@@use mingling::setup::StructuralRendererSetup;
 @@@use mingling::StructuralData;
@@ -87,11 +87,9 @@ fn handle_render(args: EntryRender) -> Next {
     Info { name, age }.to_render()
 }
  
-#[renderer]
-fn render_info(info: Info) -> RenderResult {
-    let mut r = RenderResult::new();
-    writeln!(r, "{} is {} years old", info.name, info.age).ok();
-    r
+#[renderer(buffer)]
+fn render_info(info: Info) {
+    r_println!("{} is {} years old", info.name, info.age);
 }
 @@@
 @@@fn main() {