actions: Create script for generating release notes

.github/workflows/scripts/releases/generate-release-notes/.gitignore

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+node_modules/
+*.md

.github/workflows/scripts/releases/generate-release-notes/index.js

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+import { Octokit } from "@octokit/rest";
+import { throttling } from "@octokit/plugin-throttling";
+import { retry } from "@octokit/plugin-retry";
+Octokit.plugin(throttling);
+Octokit.plugin(retry);
+const octokit = new Octokit({
+  auth: process.env.GITHUB_TOKEN,
+  userAgent: 'PCSX2/pcsx2',
+  log: {
+    debug: () => { },
+    info: () => { },
+    warn: console.warn,
+    error: console.error
+  },
+  throttle: {
+    onRateLimit: (retryAfter, options) => {
+      octokit.log.warn(
+        `Request quota exhausted for request ${options.method} ${options.url}`
+      );
+
+      // Retry twice after hitting a rate limit error, then give up
+      if (options.request.retryCount <= 2) {
+        console.log(`Retrying after ${retryAfter} seconds!`);
+        return true;
+      }
+    },
+    onAbuseLimit: (retryAfter, options) => {
+      // does not retry, only logs a warning
+      octokit.log.warn(
+        `Abuse detected for request ${options.method} ${options.url}`
+      );
+    },
+  }
+});
+
+var args = process.argv.slice(2);
+let commitSha = process.env.COMMIT_SHA;
+
+console.log(`Searching for Commit - ${commitSha}`);
+
+const { data: commit } = await octokit.rest.repos.getCommit({
+  owner: "PCSX2",
+  repo: "pcsx2",
+  ref: commitSha,
+});
+
+const { data: associatedPulls } = await octokit.rest.repos.listPullRequestsAssociatedWithCommit({
+  owner: "PCSX2",
+  repo: "pcsx2",
+  commit_sha: commit.sha,
+});
+
+let releaseNotes = ``;
+
+if (associatedPulls.length == 0) {
+  releaseNotes += `- ${commit.commit.message}\n`;
+} else {
+  for (var j = 0; j < associatedPulls.length; j++) {
+    releaseNotes += `- [${associatedPulls[j].title}](${associatedPulls[j].html_url})\n`;
+  }
+}
+
+import * as fs from 'fs';
+fs.writeFileSync('./release-notes.md', releaseNotes);

.github/workflows/scripts/releases/generate-release-notes/package.json

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+{
+  "name": "generate-release-notes",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@octokit/plugin-retry": "^3.0.9",
+    "@octokit/plugin-throttling": "^3.5.2",
+    "@octokit/rest": "^18.12.0"
+  }
+}