Add misses-rt crate, component example, README, and fix codegen for non-keyword literal tokens

- misses-rt: add Buffer/Markup HTML helpers, name/type helpers, parse_sections/parse_kv, and template AST
- codegen: add is_syn_keyword() — non-keyword idents in patterns now generate parse+compare instead of syn::Token![…]
- parser: split punct vs ident chars in literal pattern tokens so `props:` becomes two tokens
- examples: add component.mrs/.rs demonstrating named literal tokens and tt capture
- README: comprehensive guide covering .mrs syntax, running the compiler, misses-rt helpers, and examples

https://claude.ai/code/session_01Tppkab4eLsL21asHGjQJoF

misses-compiler/examples/component.mrs

@@ -0,0 +1,32 @@
+// component.mrs — Vue-like component macro generator
+// Demonstrates: named literal tokens, variadic binding, $body:tt capture,
+//               escape block using misses_rt, expression injection
+macro component! {
+    $name:ident { $($prop_name:ident : $prop_type:ty),* } $body:tt => {
+        @{
+            let struct_name = format_ident!("{}", name.to_string());
+        }
+        T~{
+            pub struct $name {
+                for prop in $prop_names =>
+                    pub $prop_name.name: $prop_name.ty,
+            }
+
+            impl $name {
+                pub fn new(${ struct_name }(
+                    for prop in $prop_names =>
+                        $prop_name.name: $prop_name.ty,
+                )) -> Self {
+                    Self {
+                        for prop in $prop_names =>
+                            $prop_name.name,
+                    }
+                }
+
+                pub fn render(&self) -> misses_rt::Markup {
+                    misses_rt::parse_template($body)
+                }
+            }
+        }
+    }
+}

misses-compiler/examples/component.rs

@@ -0,0 +1,8 @@
+fn main() {
+    let source = include_str!("component.mrs");
+    println!("=== SOURCE ===\n{source}");
+
+    let file = misses::parse(source).expect("parse error");
+    let generated = misses::codegen(&file);
+    println!("=== GENERATED ===\n{generated}");
+}