WIP: Added new script for building the README

This uses jinja templating to do so.
The script is made to exactly copy the behaviour of the current
script as now, to prove that it does the same thing.

.github/scripts/render-readme.py

@@ -0,0 +1,35 @@
+from jinja2 import Environment, FileSystemLoader
+import json
+
+technologies = {}
+
+with open("../../data.json", 'r') as datafile:
+    data = json.loads(datafile.read())
+
+for technology in data["technologies"]:
+    technologies[technology] = {"link_id": data["technologies"][technology], "entries": []}
+
+for repository in data["repositories"]:
+    repo_technologies = repository["technologies"]
+    for repo_technology in repo_technologies:
+        if not technologies.get(repo_technology, False):
+            technologies[repo_technology] = {"link_id": repo_technology.lower(), "entries": []}
+        technologies[repo_technology]["entries"].append(repository)
+
+env = Environment(loader = FileSystemLoader(".."))
+
+template = env.get_template("README.j2")
+
+categories = []
+for key, value in zip(technologies.keys(), technologies.values()):
+    categories.append({"title": key, "link_id": value["link_id"], "entries": value["entries"]})
+
+categories = sorted(categories, key=lambda x: x["title"].upper())
+for category in categories:
+    category["entries"] = sorted(category["entries"], key=lambda x: x["name"].upper())
+
+sponsors = data["sponsors"]
+
+output = template.render(categories=categories, sponsors=sponsors)
+
+open("README.md", "w").write(output)