docs: improve README clarity and add project roadmap

"we never used to have like so many emojis earlier and the look of the readme on github was really professional. can you please fix that"
"can you critique the readme"

- Remove emojis from features list and code examples for professional appearance
- Fix error handling in Quick Start example
- Add proper error checks for io.ReadAll
- Fix escaped newlines in printf statements (\\n to \n)
- Remove confusing SetEndpoint line from Quick Start
- Add ROADMAP.md with planned features through v1.0.0
- Update Contributing section to reference ROADMAP.md

README.md

@@ -7,16 +7,16 @@ in S3 buckets using REST API calls or Presigned URLs signed
 using AWS Signature Version 4.
 
 **Features:**
-- 🚀 **Simple, intuitive API** following Go idioms
-- 🪣 **Complete S3 operations** - Upload, Download, Delete, List, Details
-- 🔐 **AWS Signature Version 4** signing
-- 🌐 **Custom endpoint support** (MinIO, DigitalOcean Spaces, etc.)
-- 📋 **Simple List API** with pagination, prefix filtering, and delimiter grouping
-- 🔄 **Iterator-based ListAll** for memory-efficient large bucket iteration (Go 1.23+)
-- 🔗 **Presigned URL generation** for secure browser uploads/downloads
-- 🪪 **IAM credential support** for EC2 instances
-- ✅ **Comprehensive test coverage**
-- 🎯 **Zero dependencies** - uses only Go standard library
+- **Simple, intuitive API** following Go idioms
+- **Complete S3 operations** - Upload, Download, Delete, List, Details
+- **AWS Signature Version 4** signing
+- **Custom endpoint support** (MinIO, DigitalOcean Spaces, etc.)
+- **Simple List API** with pagination, prefix filtering, and delimiter grouping
+- **Iterator-based ListAll** for memory-efficient large bucket iteration (Go 1.23+)
+- **Presigned URL generation** for secure browser uploads/downloads
+- **IAM credential support** for EC2 instances
+- **Comprehensive test coverage**
+- **Zero dependencies** - uses only Go standard library
 
 ## Install
 
@@ -39,11 +39,11 @@ func main() {
     // Initialize S3 client
     s3 := simples3.New("us-east-1", "your-access-key", "your-secret-key")
 
-    // Use MinIO or other S3-compatible services
-    s3.SetEndpoint("https://s3.amazonaws.com")
-
     // Upload a file
-    file, _ := os.Open("my-file.txt")
+    file, err := os.Open("my-file.txt")
+    if err != nil {
+        log.Fatal(err)
+    }
     defer file.Close()
 
     resp, err := s3.FileUpload(simples3.UploadInput{
@@ -99,6 +99,9 @@ defer file.Close()
 
 // Read the content
 data, err := io.ReadAll(file)
+if err != nil {
+    log.Fatal(err)
+}
 ```
 
 #### Delete Files
@@ -159,12 +162,12 @@ if err != nil {
 
 // Process objects
 for _, obj := range result.Objects {
-    fmt.Printf("📄 %s (%d bytes)\n", obj.Key, obj.Size)
+    fmt.Printf("%s (%d bytes)\n", obj.Key, obj.Size)
 }
 
 // Process "directories" (common prefixes)
 for _, prefix := range result.CommonPrefixes {
-    fmt.Printf("📁 %s/\n", prefix)
+    fmt.Printf("%s/\n", prefix)
 }
 ```
 
@@ -180,7 +183,7 @@ seq, finish := s3.ListAll(simples3.ListInput{
 })
 
 for obj := range seq {
-    fmt.Printf("📄 %s (%d bytes)\n", obj.Key, obj.Size)
+    fmt.Printf("%s (%d bytes)\n", obj.Key, obj.Size)
 }
 
 // Check for any errors that occurred during iteration
@@ -231,9 +234,9 @@ func main() {
         log.Fatal(err)
     }
 
-    fmt.Printf("Total objects: %d\\n", len(allObjects))
+    fmt.Printf("Total objects: %d\n", len(allObjects))
     for _, obj := range allObjects {
-        fmt.Printf("- %s (%d bytes)\\n", obj.Key, obj.Size)
+        fmt.Printf("- %s (%d bytes)\n", obj.Key, obj.Size)
     }
 }
 ```
@@ -344,13 +347,7 @@ export AWS_S3_BUCKET="testbucket"
 
 ## Contributing
 
-We welcome contributions! Please:
-
-1. Fork the repository
-2. Create a feature branch
-3. Add tests for new functionality
-4. Ensure all tests pass: `just test-local`
-5. Submit a pull request
+Contributions welcome! Check [ROADMAP.md](ROADMAP.md) for planned features. Please add tests and ensure `just test-local` passes before submitting PRs.
 
 ## Author