Allow disabling categories of filters

.gitignore

@@ -1 +1,2 @@
 /target
+.direnv

README.md

@@ -14,8 +14,11 @@ category "Spotify" {
 category "Campaign tracking (itm)" {
 	params "itm_*"
 }
+category "Campaign tracking (stm)" disabled=true {
+	params "stm_*"
+}
 ```
-Categories do not have significance other than to make filter files better structured. 
+Categories are used to structure filter lists and allow disabling/enabling filters in groups. 
 Each parameter applies to all URLs, unless a domain like `@example.com` is specified at the end. 
 Both the parameter and the domain parts can contain wildcards. Use `*` to match 0 or more characters, and `?` to match exactly one character.  
 The structure is based on [NeatURL's format](https://github.com/Smile4ever/Neat-URL/#default-blocked-parameters), with a few differences (aside from a different file format):  

src/main.rs

@@ -9,6 +9,8 @@ use wildmatch::WildMatch;
 struct Category {
     #[knuffel(argument)]
     name: String,
+    #[knuffel(property, default)]
+    disabled: bool,
     #[knuffel(child, unwrap(arguments))]
     params: Vec<String>,
 }
@@ -24,12 +26,15 @@ fn main() -> Result<()> {
         .into_diagnostic()
         .map_err(|err| err.context(format!("Could not read file `{filters}`")))?;
 
-    let filters = knuffel::parse::<Vec<Category>>("config.kdl", &filters)?;
+    let filters = knuffel::parse::<Vec<Category>>("config.kdl", &filters)?
+        .into_iter()
+        .filter(|v| !v.disabled)
+        .collect::<Vec<Category>>();
 
     println!("Loaded with categories:");
     filters.iter().for_each(|v| println!("\t• {}", v.name));
 
-    // Flatten all patterns into a single list, as categories do not matter
+    // Flatten filters into patterns
     let patterns: Vec<String> = filters.iter().map(|v| v.params.clone()).flatten().collect();
 
     // Initialize clipboard context