chore: rename matcher and param

Author: WarningImHack3r

src/params/pid.ts

@@ -0,0 +1,3 @@
+export function match(param: string) {
+	return param === "pull" || param === "issues" || param === "discussion";
+}

src/params/poi.ts

@@ -2,7 +2,7 @@ import { error, redirect } from "@sveltejs/kit";
 import { gitHubCache } from "$lib/server/github-cache";
 
 export async function load({ params }) {
-	const { pullOrIssue: type, org, repo, id } = params;
+	const { pid: type, org, repo, id } = params;
 	const numId = +id; // id is already validated by the route matcher
 
 	const item = await gitHubCache.getItemDetails(org, repo, numId);