Bump versions and add changelogs

Author: sferik

CHANGELOG.md

@@ -0,0 +1,22 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [6.0.0] - 2026-03-02
+
+### Added
+
+- Rust rewrite of the t Twitter CLI with legacy-compatible command surface
+- X API client library (x-api) for HTTP, auth, and retry primitives
+- OAuth 1.0a and OAuth 2.0 authentication support
+- Automatic retry with backoff for transient API errors
+- V1.1 and V2 Twitter API support with automatic fallback
+- Streaming support for filtered and sampled streams
+- Column-aligned output format matching legacy Ruby CLI
+- YAML configuration file support
+- Bash completion support
+
+[6.0.0]: https://github.com/sferik/x-cli/releases/tag/v6.0.0

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "x"
-version = "5.0.0"
+version = "6.0.0"
 edition = "2024"
 description = "Rust rewrite of the t Twitter CLI with legacy-compatible command surface"
 license = "MIT"