feat(src/commands): expose xorg_intel, xorg_amd, and generate_xrandr_script as public functions

- Made the three helper functions public to allow external usage
- Facilitates reuse of GPU configuration helpers
- No functional changes beyond visibility

src/commands/gpu.rs

@@ -117,7 +117,7 @@ done
 "#;
 
 // Helpers
-fn xorg_intel(bus_id: &str) -> String {
+pub fn xorg_intel(bus_id: &str) -> String {
     format!(
         r#"# Automatically generated by lapctl
 
@@ -153,7 +153,7 @@ EndSection
     )
 }
 
-fn xorg_amd(bus_id: &str) -> String {
+pub fn xorg_amd(bus_id: &str) -> String {
     format!(
         r#"# Automatically generated by lapctl
 
@@ -189,7 +189,7 @@ EndSection
     )
 }
 
-fn generate_xrandr_script(igpu_vendor: Option<&String>) -> String {
+pub fn generate_xrandr_script(igpu_vendor: Option<&String>) -> String {
     let source_name = match igpu_vendor.map(|s| s.as_str()) {
         Some("intel") => "modesetting".to_string(),
         Some("amd") => {