Update documentation with detailed explanations

Cargo.toml

@@ -24,3 +24,9 @@ plugins = [
     "path:crates/tasmota",
     "path:crates/weather",
 ]
+bin = [
+    "path:crates/litehouse",
+    "path:crates/litehouse-config",
+    "path:crates/plugin",
+    "path:crates/plugin-macro",
+]

crates/litehouse-config/src/capabilities.rs

@@ -0,0 +1,71 @@
+//! Capabilities for Litehouse plugins.
+//!
+//! This module defines the capabilities that can be granted to plugins, allowing them to interact with the system and external resources in a controlled manner.
+
+use serde::{Deserialize, Serialize};
+use std::fmt;
+use std::str::FromStr;
+use thiserror::Error;
+
+/// Represents the different capabilities that can be granted to plugins.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Capability {
+    /// Allows the plugin to start an HTTP server on the specified port.
+    HttpServer(u16),
+    /// Allows the plugin to make HTTP requests to the specified URL.
+    HttpClient(String),
+}
+
+impl Serialize for Capability {
+    fn serialize<S>(&self, serializer: S) -> std::prelude::v1::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        let string = self.to_string();
+        serializer.serialize_str(&string)
+    }
+}
+
+impl<'de> Deserialize<'de> for Capability {
+    fn deserialize<D>(deserializer: D) -> std::prelude::v1::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let s = String::deserialize(deserializer)?;
+        s.parse().map_err(serde::de::Error::custom)
+    }
+}
+
+impl fmt::Display for Capability {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Capability::HttpServer(port) => write!(f, "http-server:{}", port),
+            Capability::HttpClient(url) => write!(f, "http-client:{}", url),
+        }
+    }
+}
+
+impl FromStr for Capability {
+    type Err = CapabilityParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let parts: Vec<&str> = s.splitn(2, ':').collect();
+        match parts.as_slice() {
+            ["http-server", port] => port
+                .parse()
+                .map(Capability::HttpServer)
+                .map_err(|_| CapabilityParseError::InvalidPort),
+            ["http-client", url] => Ok(Capability::HttpClient(url.to_string())),
+            _ => Err(CapabilityParseError::InvalidFormat),
+        }
+    }
+}
+
+/// Errors that can occur when parsing a string into a `Capability`.
+#[derive(Debug, Error)]
+pub enum CapabilityParseError {
+    #[error("invalid capability format")]
+    InvalidFormat,
+    #[error("invalid port number")]
+    InvalidPort,
+}

crates/litehouse-config/src/hash_read.rs

@@ -1,8 +1,8 @@
-use pin_project_lite::pin_project;
 use std::task::Poll;
-use tokio::io::AsyncRead;
 
 use digest::Digest;
+use pin_project_lite::pin_project;
+use tokio::io::AsyncRead;
 
 pin_project! {
     pub struct HashRead<T, H> {