Present aiken-lsp & fill-in CHANGELOG

CHANGELOG.md

@@ -6,7 +6,9 @@
 
 - **aiken-project**: The `plutus.json` blueprint now contains a `compiler.name`
   and `compiler.version` fields.
-- **aiken-prokect**: Add compiler and system information to panic error report.
+- **aiken-prokect**: Added compiler and system information to panic error report.
+- **aiken-lsp**: Added quickfix suggestions for unknown variables, modules and
+  constructors.
 
 ### Changed
 
@@ -20,8 +22,9 @@
 
 ### Fixed
 
-- **aiken-lang**: improved error messages for `a |> b(x)`
+- **aiken-lang**: improved error messages for `a |> b(x)`.
-- **uplc**: Fixed cost model issue when using div, quot, rem, mod
+- **uplc**: Fixed cost model issue when using div, quot, rem, mod.
+- **aiken-lsp**: Improved hovering suggestions and type annotations.
 
 ## v1.0.19-alpha - 2023-09-29
 

crates/aiken-lsp/README.md

@@ -0,0 +1,39 @@
+# Aiken Language Server Protocol (LSP)
+
+The `aiken` command-line comes built-in with a _Language Server_ implementing
+(part of) the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/).
+
+## Getting Started
+
+### General
+
+Regardless of your IDE, you'll likely need the following information to configure your language client:
+
+- command: `aiken lsp`
+  > **Note**
+  > The command is hidden from the command-line help usage
+
+- root pattern: `aiken.toml`
+- filetype: `aiken` `(.ak)`
+
+### VsCode
+
+Simply install the [VSCode Aiken extension](https://marketplace.visualstudio.com/items?itemName=TxPipe.aiken) from the official marketplace.
+
+### NeoVim
+
+If you're using NeoVim and using [`nvim-lspconfig`](https://github.com/neovim/nvim-lspconfig) then there's almost
+nothing to do as Aiken is directly supported. Simply follow the [official
+instructions](https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md#aiken)
+
+## Supported Capabilities
+
+- [x] Document syncing and on-the-fly compilation
+- [x] Document formatting (akin to `aiken fmt`)
+- [x] Go-to definition
+- [x] Type annotation on hover
+- [x] Code actions providing quickfixes for a variety of errors:
+    - [x] `aiken::check::unknown::variable`
+    - [x] `aiken::check::unknown::type`
+    - [x] `aiken::check::unknown::type_constructor`
+    - [x] `aiken::check::unknown::module`