Remove rustfs-gui module (#445)

This commit completely removes the rustfs-gui module from the project. The deletion includes:

- All source code files (*.rs) and associated resources
- GUI-specific dependencies from Cargo.toml
- Build scripts and configuration files specific to the GUI module
- Documentation and assets related to the graphical interface

The removal is performed because:
- The GUI component is no longer maintained
- Focus is shifting to core functionality and CLI interface
- Limited resources available for GUI development and maintenance

The core filesystem functionality remains available through the rustfs library and CLI interface.

Cargo.toml

@@ -15,7 +15,6 @@
 [workspace]
 members = [
     "rustfs", # Core file system implementation
-    "cli/rustfs-gui", # Graphical user interface client
     "crates/appauth", # Application authentication and authorization
     "crates/audit-logger", # Audit logging system for file operations
     "crates/common", # Shared utilities and data structures
@@ -118,8 +117,6 @@ criterion = { version = "0.7", features = ["html_reports"] }
 dashmap = "6.1.0"
 datafusion = "46.0.1"
 derive_builder = "0.20.2"
-dioxus = { version = "0.6.3", features = ["router"] }
-dirs = "6.0.0"
 enumset = "1.1.9"
 flatbuffers = "25.2.10"
 flate2 = "1.1.2"
@@ -145,11 +142,6 @@ http-body = "1.0.1"
 humantime = "2.2.0"
 ipnetwork = { version = "0.21.1", features = ["serde"] }
 jsonwebtoken = "9.3.1"
-keyring = { version = "3.6.3", features = [
-    "apple-native",
-    "windows-native",
-    "sync-secret-service",
-] }
 lazy_static = "1.5.0"
 libsystemd = { version = "0.7.2" }
 local-ip-address = "0.6.5"
@@ -201,17 +193,12 @@ reqwest = { version = "0.12.23", default-features = false, features = [
     "json",
     "blocking",
 ] }
-rfd = { version = "0.15.4", default-features = false, features = [
-    "xdg-portal",
-    "tokio",
-] }
 rmcp = { version = "0.5.0" }
 rmp = "0.8.14"
 rmp-serde = "1.3.0"
 rsa = "0.9.8"
 rumqttc = { version = "0.24" }
 rust-embed = { version = "8.7.2" }
-rust-i18n = { version = "3.1.5" }
 rustfs-rsc = "2025.506.1"
 rustls = { version = "0.23.31" }
 rustls-pki-types = "1.12.0"
@@ -256,7 +243,6 @@ tonic-prost-build = { version = "0.14.1" }
 tower = { version = "0.5.2", features = ["timeout"] }
 tower-http = { version = "0.6.6", features = ["cors"] }
 tracing = "0.1.41"
-tracing-appender = "0.2.3"
 tracing-core = "0.1.34"
 tracing-error = "0.2.1"
 tracing-opentelemetry = "0.31.0"