docs: improve examples documentation and remove redundant comments

CLAUDE.md

@@ -34,6 +34,22 @@ Key resources:
 - Design decisions (Why no structural inference?, etc.)
 - Versioning policy
 
+## Usage Examples
+
+The `examples/` directory contains comprehensive usage examples:
+
+- `00-basic.ts` - Basic parsing and type narrowing
+- `01-file-upload.ts` - File handling with type guards
+- `02-field-presence.ts` - Field presence checks
+- `03-error-handling.ts` - Validation issue handling
+- `04-integration-fetch.ts` - Integration with Request/Fetch API
+
+Run type checking for examples:
+
+```bash
+bun run check:type:example
+```
+
 ## Development Commands
 
 ### Setup

examples/00-basic.ts

@@ -23,14 +23,12 @@ if (result.data === null) {
 // but it is typed as Record<string, string | File>.
 const data = result.data;
 
-// name: string | File
 const name = data["name"];
 if (typeof name !== "string") {
 	throw new Error("Expected name to be a string");
 }
 name.toUpperCase();
 
-// age: string | File
 const age = data["age"];
 if (typeof age !== "string") {
 	throw new Error("Expected age to be a string");

examples/01-file-upload.ts

@@ -29,7 +29,6 @@ if (result.data === null) {
 // but values are still typed as string | File.
 const data = result.data;
 
-// avatar: string | File
 const avatar = data["avatar"];
 
 // Narrow to File before accessing file-specific properties