Create README.md for sway-lsp (FuelLabs#5303)

## Description


## Checklist

- [ ] I have linked to any relevant issues.
- [ ] I have commented my code, particularly in hard-to-understand
areas.
- [ ] I have updated the documentation where relevant (API docs, the
reference, and the Sway book).
- [ ] I have added tests that prove my fix is effective or that my
feature works.
- [ ] I have added (or requested a maintainer to add) the necessary
`Breaking*` or `New Feature` labels where relevant.
- [ ] I have done my best to ensure that my PR adheres to [the Fuel Labs
Code Review
Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md).
- [ ] I have requested a review from the relevant team or maintainers.

sway-lsp/README.md

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+
+# Sway Language Server
+
+[![Visual Studio Marketplace Version](https://img.shields.io/visual-studio-marketplace/v/FuelLabs.sway-vscode-plugin)](https://marketplace.visualstudio.com/items?itemName=FuelLabs.sway-vscode-plugin)
+[![discord](https://img.shields.io/badge/chat%20on-discord-orange?&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://discord.gg/xfpK4Pe)
+
+This extension provides LSP support for the Sway smart contract programming language.
+
+## Features
+
+- goto type definition 
+- types and documentation on hover
+- inlay hints for types and parameter names
+- semantic syntax highlighting
+- symbol renaming
+- code actions
+- imports insertion
+
+
+_Coming Soon_
+- code completion
+- apply suggestions from errors
+- find all references, workspace symbol search
+- ... and many more
+
+## Quick start
+
+1. Install the [Fuel toolchain](https://fuellabs.github.io/fuelup/master/installation/index.html).
+1. Ensure `forc-lsp` is installed correctly by entering `forc-lsp --version` into your terminal.
+1. Install the [Sway VSCode plugin](https://marketplace.visualstudio.com/items?itemName=FuelLabs.sway-vscode-plugin).