Resolve media and template files relative to component class dir (#395), thanks @JuroOravec

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Emil Stenström <emil@emilstenstrom.se>

tests/components/relative_file/relative_file.css

@@ -0,0 +1,3 @@
+.html-css-only {
+  color: blue;
+}

tests/components/relative_file/relative_file.html

@@ -0,0 +1,5 @@
+<form method="post">
+  {% csrf_token %}
+  <input type="text" name="variable" value="{{ variable }}">
+  <input type="submit">
+</form>

tests/components/relative_file/relative_file.js

@@ -0,0 +1 @@
+console.log("JS file");

tests/components/relative_file/relative_file.py

@@ -0,0 +1,24 @@
+from typing import Any, Dict
+
+from django.http import HttpResponse
+
+from django_components import component
+
+
+@component.register("relative_file_component")
+class RelativeFileComponent(component.Component):
+    template_name = "relative_file.html"
+
+    class Media:
+        js = "relative_file.js"
+        css = "relative_file.css"
+
+    def post(self, request, *args, **kwargs) -> HttpResponse:
+        variable = request.POST.get("variable")
+        return self.render_to_response({"variable": variable})
+
+    def get(self, request, *args, **kwargs) -> HttpResponse:
+        return self.render_to_response({"variable": "GET"})
+
+    def get_context_data(self, variable, *args, **kwargs) -> Dict[str, Any]:
+        return {"variable": variable}