Refactor eleventy proposal

[arkhi]

@alifeee made a proposal in a previous PR.

This is a different approach using structured data instead of HTML:

1. Each participant has their own space to add data: the Toml file.
2. The data is massaged to fit our use.

This PR does not touch master for now.

---

Things in this PR:

• Add .editorconfig.
• Add linters for JS and Toml files.
• Use Eleventy.
• Add basic nunjucks templates, based on existing files.
• Structure data in toml files.
• Fix data consistency.
• Tag or remove obvious spam (Still quite a few to check in my opinion).
• Create Github Actions to deploy on staging for now.
• Remove github pages-related files.
• Update link to create an entry.
• Update README.md.

---

Some URL might lead to spam right now, but might have been totally legit websites at the time of submission. This is why some websites were not always removed.

Closes #160 #166.

From HTML to Toml files.

I used the following template and globalData to generate Toml files:

---
pagination:
  data: tomlFromLegacyHTML
  size: 1
  alias: participant
permalink: _exports/{{ participant | replace("/", "") | escape }}.toml
eleventyAllowMissingExtension: true
---
display = "{{ tomlFromLegacyHTML[participant].display | safe }}"

# Websites
# ------------------------------------------------------------------------------
{% for website in tomlFromLegacyHTML[participant].websites %}
[[websites]]
url   = "{{ website.url }}"
title = "{{ website.title }}"
years = [{{ website.years }}]
{% endfor %}

  // Create Toml files based on legacy HTML files.
  // TODO: Tweaked files to restore mistakes.
  eleventyConfig.addGlobalData("tomlFromLegacyHTML", () => {
    // Comment next line to create toml files based on existing HTML files.
    // Files can be found in _site/exports/participants/.
    return {};

    const files = fs.readdirSync(`./_assets/legacy-html-files/`);
    const participants = {};
    const findWebsite = (websites, url) => websites.find(website => website.url === url);

    for (const file of files) {
      const content = fs.readFileSync(
        `./_assets/legacy-html-files/${file}`, 'utf8'
      );

      const listContent = /            <li>(?<inner>.*)<\/li>/g;
      const listItems = [...content.matchAll(listContent)];

      listItems.forEach((item, index) => {
        // SEE https://regex101.com/r/g4rGk7
        // TODO Improve grouping?
        const groups = [...item.groups.inner.matchAll(/(?<prefix>.*?)[\W+]*((<a.+?href="(?<url>[^"]+)">(?<title>.+?)<\/a>)[\W+]*?)/g)];

        // Set default values for slug.
        let participantID = groups[0]?.groups?.prefix?.trim();
        let title = groups[0]?.groups?.title?.trim();

        groups.forEach(group => {
          const url = group.groups.url;
          const currentYear = file.replace('.html', '');

          // Slugify potential id, with fallback in case of non-latin characters.
          const slug =
            `${eleventyConfig.getFilter("slugify")(participantID || title)}`
            || `${title}-${index}`;

          title = group.groups.title;

          // Create entry if not already present.
          if (!participants[slug]) {
            participants[slug] = {
              display: participantID || title,
              websites: [],
            };
          }

          // Add website to existing entries.
          if (!findWebsite(participants[slug].websites, url)) {
            participants[slug].websites.push({
              url: url,
              title: title || participantID,
              years: [currentYear],
            });
          } else {
            if (!findWebsite(participants[slug].websites, url).years.find(year => year === currentYear)) {
              findWebsite(participants[slug].websites, url).years.push(
                currentYear
              );
            }
          }
        });
      });
    }

    return participants;
  });

[j9t]

I’m on the road for a few days—will try to review in between but can’t tell yet.