Update CHANGELOG

Author: mo8it

CHANGELOG.md

@@ -1,3 +1,64 @@
+<a name="6.0.0"></a>
+## 6.0.0 (2024-07-02)
+
+This release is the result of a complete rewrite to deliver a ton of new features and improvements ✨
+The most important changes are highlighted below.
+
+### Installation
+
+The installation has been simplified a lot!
+To install Rustlings after installing Rust, all what you need to do now is running the following command:
+
+```bash
+cargo install rustlings
+```
+
+Yes, this means that Rustlings is now on [crates.io](https://crates.io/crates/rustlings) 🎉
+
+You can read about the motivations of this change in [this issue](https://github.com/rust-lang/rustlings/issues/1919).
+
+### UI/UX
+
+- The UI is now responsive when the terminal is resized.
+- The progress bar was moved to the bottom so that you can always see your progress and the current exercise to work on.
+- The current exercise path is now a terminal link. It will open the exercise file in your default editor when you click on it.
+- A small prompt is now always shown at the bottom. It allows you to choose an action by entering a character. For example, entering `h` will show you the hint of the current exercise.
+- The comment "I AM NOT DONE!" doesn't exist anymore. Instead of needing to remove it to go to the next exercise, you need to enter `n` in the terminal.
+
+### List mode
+
+A list mode was added using [`Ratatui`](https://ratatui.rs).
+You can enter it by entering `l` in the watch mode.
+It offers the following features:
+
+- Browse all exercises and see their state (pending/done).
+- Filter exercises based on their state (done/pending).
+- Continue at another exercise. This allows you to skip some exercises or go back to previous ones.
+- Reset an exercise so that you can start over and revert your changes.
+
+### Solutions
+
+After finishing an exercise, a solution file will be available and Rustlings will show you its path in green.
+This allows you to compare your solution with an idiomatic solution and maybe learn about other ways to solve a problem.
+
+### LSP support out of the box
+
+Instead of creating a `project.json` file using `rustlings lsp`, Rustlings now works with a `Cargo.toml` file.
+This should avoid issues related to the language server or to running exercises, especially the ones with Clippy.
+
+### Clippy
+
+Clippy lints are now shown on all exercises! 📎
+Make Clippy your friend from early on 🥰
+
+### Third party exercises
+
+Rustlings now supports third-party exercises!
+
+Do you want to create your own set of Rustlings exercises to focus on some specific topic?
+Or did you want to translate the original Rustlings exercises?
+Then follow the link to the guide about [third-party exercises](THIRD_PARTY_EXERCISES.md)!
+
 <a name="5.6.1"></a>
 ## 5.6.1 (2023-09-18)
 
@@ -30,7 +91,7 @@
 - Swapped the order of threads and smart pointer exercises.
 - Rewrote the CLI to use `clap` - it's matured much since we switched to `argh` :)
 - `structs3`: Switched from i32 to u32.
-- `move_semantics`: Switched 1-4 to tests, and rewrote them to be way simpler, while still teaching about the same 
+- `move_semantics`: Switched 1-4 to tests, and rewrote them to be way simpler, while still teaching about the same
   concepts.
 
 #### Fixed