Add workflows and actions files (#38)

.github/actions/action.yml

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+name: "Better Suggestions"
+description: "A GitHub action to allow users to suggest changes alternative."
+runs:
+    using: 'node12'
+    main: 'index.js'

.github/actions/index.js

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+const fs = require("fs");
+
+const PREFIX = "Suggestion:";
+
+function parseURLFromIssueTitle(title) {
+  return title.replace(PREFIX, "").trim();
+}
+
+function findExistingMatchForUrl(url, list) {
+  return list.findIndex((listItem) => {
+    const match = url.match(new RegExp(listItem.urlPattern));
+    return match;
+  });
+}
+
+fs.readFile(`${process.env.GITHUB_WORKSPACE}/defaultlist.json`, function (err, file) {
+  if (err) {
+    return console.log("Unable to scan directory: " + err);
+  }
+  const database = JSON.parse(file.toString());
+  const gh_context = JSON.parse(process.env.gh_context);
+  const issueTitle = gh_context.event.issue.title;
+  if (!issueTitle.startsWith(PREFIX)) {
+    return;
+  }
+  const [suggestedUrl, name, ...descriptions] = gh_context.event.issue.body.split("\n");
+  const url = parseURLFromIssueTitle(issueTitle);
+  const existingIndex = findExistingMatchForUrl(url, database);
+  console.log("Index for url", url, existingIndex);
+  const newItem = { url: suggestedUrl.trim(), name: name.trim(), desc: descriptions.join() };
+  console.log("New Item", newItem);
+  if (existingIndex === -1) {
+    const item = {
+      urlPattern: url,
+      alternatives: [newItem],
+    };
+    database.push(item);
+  } else {
+    database[existingIndex].alternatives.push(newItem);
+  }
+  fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/defaultlist.json`, JSON.stringify(database, null, 4));
+});

.github/workflows/main.yml

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+name: Issues Workflow
+
+# Controls when the action will run.
+on:
+  issues:
+    types: [opened]
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    env: 
+      gh_context: ${{ toJson(github) }}
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - uses: actions/checkout@v2
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: ./.github/actions/action
+      - uses: peter-evans/create-pull-request@v3
+        name: Create Pull Request
+        with:
+          branch-suffix: random
+          labels: "Default List Suggestion"