feat(test): implement Playwright E2E and Dockerized testing infrastructure

test_space_e2e/CONFIG.md

@@ -0,0 +1,14 @@
+
+# Configuration
+
+```space-lua
+config.set("icalendar", {
+  sources = {
+    {
+      url = "http://172.22.0.3/reachcalendar.ics",
+      name = "TestCalendar"
+    }
+  }
+})
+```
+

test_space_e2e/index.md

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+.iCalendar: Sync
+# Meetings for Jan 20th, 2026.iCalendar: Sync
+.
+
+.iCalendar: Sync
+.iCalendar: Sync
+
+
+${template.each(query[[
+    from e = index.tag "ical-event"
+    where e.start:startsWith("2026-01-20")
+    order by e.start
+    ]], function(e)
+    return string.format("* %s to %s: %s (TZ: %s)\n",
+    e.start:sub(12, 16),
+    e["end"]:sub(12, 16),
+    e.summary,
+    e.timezone or "UTC")
+   end)}
+
+# Welcome 👋
+
+Welcome to the wondrous world of SilverBullet.