feat(service): Plugins may define a priority for their results

Adds an additional parameter for prioritizing the search results from a
specific plugin. The plugin may define a priority which will sort
results after the initial pattern search. The web plugin will be the
first plugin to utilize this feature

service/src/plugins/config.rs

@@ -52,6 +52,9 @@ pub struct PluginQuery {
     #[serde(default)]
     pub persistent: bool,
 
+    #[serde(default)]
+    pub priority: PluginPriority,
+
     #[serde(
         default,
         skip_serializing_if = "Option::is_none",
@@ -60,6 +63,19 @@ pub struct PluginQuery {
     pub regex: Option<Cow<'static, str>>,
 }
 
+#[derive(Copy, Clone, Debug, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
+pub enum PluginPriority {
+    High = 0,
+    Default = 1,
+    Low = 2,
+}
+
+impl Default for PluginPriority {
+    fn default() -> Self {
+        Self::Default
+    }
+}
+
 pub fn load(source: &Path, config_path: &Path) -> Option<(PathBuf, PluginConfig, Option<Regex>)> {
     if let Ok(config_bytes) = std::fs::read_to_string(&config_path) {
         let config = match ron::from_str::<PluginConfig>(&config_bytes) {