docs: update all guides for v0.11.0-beta release

- INSTALLATION.md: Update version references to v0.11.0-beta
- QUICKSTART.md: Update write support Q&A with v0.11.0-beta status
- READING_DATA.md: Update version reference for thread-safety note
- TROUBLESHOOTING.md: Update library version in troubleshooting guide

Author: kolkov

docs/guides/INSTALLATION.md

@@ -43,7 +43,7 @@ Add the library to your project's `go.mod`:
 go mod init myproject
 
 # Add the library
-go get github.com/scigolib/hdf5@v0.10.0-beta
+go get github.com/scigolib/hdf5@v0.11.0-beta
 ```
 
 Or manually add to `go.mod`:
@@ -54,7 +54,7 @@ module myproject
 go 1.25
 
 require (
-    github.com/scigolib/hdf5 v0.10.0-beta
+    github.com/scigolib/hdf5 v0.11.0-beta
 )
 ```
 
@@ -94,7 +94,7 @@ import (
 
 func main() {
     fmt.Println("HDF5 library imported successfully!")
-    fmt.Printf("Library version: v0.10.0-beta\n")
+    fmt.Printf("Library version: v0.11.0-beta\n")
 }
 ```
 
@@ -106,7 +106,7 @@ go run test_install.go
 Expected output:
 ```
 HDF5 library imported successfully!
-Library version: v0.10.0-beta
+Library version: v0.11.0-beta
 ```
 
 ### Functional Verification
@@ -289,7 +289,7 @@ go get -u github.com/scigolib/hdf5
 ### Update to Specific Version
 
 ```bash
-go get github.com/scigolib/hdf5@v0.10.0-beta
+go get github.com/scigolib/hdf5@v0.11.0-beta
 ```
 
 ### Check Current Version
@@ -306,7 +306,7 @@ go list -m github.com/scigolib/hdf5
 
 **Problem**:
 ```
-go: github.com/scigolib/hdf5@v0.10.0-beta: reading github.com/scigolib/hdf5/go.mod at revision v0.10.0-beta: unknown revision v0.10.0-beta
+go: github.com/scigolib/hdf5@v0.11.0-beta: reading github.com/scigolib/hdf5/go.mod at revision v0.11.0-beta: unknown revision v0.11.0-beta
 ```
 
 **Solution**:

docs/guides/QUICKSTART.md

@@ -344,7 +344,7 @@ python create_test.py
 - ✅ Chunked datasets
 
 ### Q: Can I write HDF5 files?
-**A**: Not yet in v0.10.0-beta. Write support is planned for v0.11.0+ (2-3 months). See [ROADMAP.md](../../ROADMAP.md) for details.
+**A**: Yes! v0.11.0-beta has MVP write support (contiguous datasets, all datatypes, groups). Chunked datasets and compression coming in v0.11.1-beta. See [ROADMAP.md](../../ROADMAP.md) for details.
 
 ### Q: Does it require CGo?
 **A**: **No!** This is a pure Go implementation with zero C dependencies. Works on all Go-supported platforms.

docs/guides/READING_DATA.md

@@ -660,7 +660,7 @@ file.Walk(func(path string, obj hdf5.Object) {
 
 ### 5. Reuse File Handles (Concurrency)
 
-**Note**: Current version (v0.10.0-beta) is not thread-safe. Each goroutine should have its own file handle:
+**Note**: Current version (v0.11.0-beta) is not thread-safe. Each goroutine should have its own file handle:
 
 ```go
 // For concurrent processing, open multiple handles

docs/guides/TROUBLESHOOTING.md

@@ -702,7 +702,7 @@ Include:
 
 ```markdown
 **Go version**: go1.25.1 linux/amd64
-**Library version**: github.com/scigolib/hdf5 v0.10.0-beta
+**Library version**: github.com/scigolib/hdf5 v0.11.0-beta
 **OS**: Ubuntu 22.04
 
 **Problem**: Cannot read string dataset