chore: add EntryFallback completion support

Add `#[completion(EntryFallback)]` syntax to enable custom
completion suggestions for unmatched entries, merging fallback
results with default completions via `Suggest::combine()`.

1 files changed, 12 insertions, 1 deletions

diff --git a/docs/dev/pages/issues/the-shit-time.md b/docs/dev/pages/issues/the-shit-time.md
index 9d6c429..b23854e 100644
--- a/docs/dev/pages/issues/the-shit-time.md
+++ b/docs/dev/pages/issues/the-shit-time.md
@@ -9,7 +9,7 @@ Of course, you can also contribute to this document.
 
 ---
 
-## Why is there no fallback completion logic?
+## Why is there no fallback completion logic? (Solved)
 
 (completion) (fallback)
 
@@ -34,6 +34,17 @@ fn complete(ctx: &ShellContext) -> Suggest {
     // ...
 }
 ```
+
+Final implementation:
+
+By adding support for `EntryFallback` (formerly `ErrorDispatcherNotFound`) to the Completion system, `EntryFallback` can now be used as a completion entry point when no subcommand is matched:
+
+```rust
+#[completion(EntryFallback)]
+fn complete_fallback(_ctx: &ShellContext) -> Suggest {
+    suggest! { "fallback" }
+}
+```
  
 ---