chore(crates): introduce new config crate for sprout configuration

crates/config/src/actions.rs

@@ -0,0 +1,32 @@
+use serde::{Deserialize, Serialize};
+
+/// Configuration for the chainload action.
+pub mod chainload;
+
+/// Configuration for the edera action.
+pub mod edera;
+
+/// Configuration for the print action.
+pub mod print;
+
+/// Declares an action that sprout can execute.
+/// Actions allow configuring sprout's internal runtime mechanisms with values
+/// that you can specify via other concepts.
+///
+/// Actions are the main work that Sprout gets done, like booting Linux.
+#[derive(Serialize, Deserialize, Debug, Default, Clone)]
+pub struct ActionDeclaration {
+    /// Chainload to another EFI application.
+    /// This allows you to load any EFI application, either to boot an operating system
+    /// or to perform more EFI actions and return to sprout.
+    #[serde(default)]
+    pub chainload: Option<chainload::ChainloadConfiguration>,
+    /// Print a string to the EFI console.
+    #[serde(default)]
+    pub print: Option<print::PrintConfiguration>,
+    /// Boot the Edera hypervisor and the root operating system.
+    /// This action is an extension on top of the Xen EFI stub that
+    /// is specific to Edera.
+    #[serde(default, rename = "edera")]
+    pub edera: Option<edera::EderaConfiguration>,
+}