Add 'getting-started' first draft.

Mostly to have a place to list editors integrations.

book/src/SUMMARY.md

@@ -1,6 +1,7 @@
 # Summary
 
 - [Introduction](./introduction.md)
+- [Getting Started](./getting-started.md)
 - [Untyped Plutus Core](./uplc.md)
     - [Syntax](./uplc/syntax.md)
     - [Command-line utilities](./uplc/cli.md)

book/src/getting-started.md

@@ -0,0 +1,22 @@
+# Getting Started
+
+## Installation
+
+### From Source
+
+```console
+$ cargo install aiken
+```
+
+## QuickStart
+
+```
+$ aiken --help
+```
+
+## Editor Integrations
+
+| Editor     | Plugin                                                         |
+| ---        | ---                                                            |
+| VSCode     | [TxPipe/vscode-aiken](https://github.com/txpipe/vscode-aiken/) |
+| Vim/Neovim | [CardanoSolutions/aiken-vim](https://github.com/txpipe/aiken)  |