[Docs] Draft release notes for v0.1.0-alpha

[NAME-ASHWANIYADAV]

As requested by @illume on Slack - draft release notes for the first v0.1.0-alpha release (companion to #43). Feedback welcome before we cut the release.

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Agones Headlamp Plugin v0.1.0-alpha

⚠️ This is an alpha release. The plugin is under active development as part of the LFX Mentorship programme - APIs and features may change between releases.

The first public release of the Agones Headlamp plugin: visualise and manage Agones game servers, fleets, and autoscalers directly from the Headlamp UI.

✨ Highlights

• Overview Dashboard - at-a-glance summary of all Agones resources across the cluster, with game server counts grouped by lifecycle state.
• Fleets - list and detail views with replica status (ready / allocated / reserved), scheduling strategy, and the game servers belonging to each fleet.
• Game Servers - detail pages with colour-coded lifecycle state chips, node address and port tables, counters & lists, and a preview of the backing pod.
• Fleet Autoscalers - every policy type (Buffer, Webhook, Counter, List, Schedule, Chain) rendered as readable tables, with a plain-English explainer of the current scaling status.
• Allocations from the UI - create GameServerAllocation requests via a guided dialog: label selectors, scheduling, counter/list filters, mutations, and priorities.
• Map View - visual graph of the relationships between Fleets, GameServers, and Pods.
• Agones Detection Guard - clusters without Agones get a friendly install banner instead of empty views.
• Allocated-Session Protection - a warning banner on Allocated game servers reminds operators that live player sessions may be connected.

🔧 Under the Hood

• TypeScript resource models aligned with the upstream Agones Go structs (eviction, addresses, reservedUntil, allocationOverflow, priorities, counters/lists, Wasm autoscaling policy).
• Unit test suite with Vitest, plus CI (GitHub Actions), Dependabot, and DCO enforcement.
• Built on Headlamp's common components for consistent theming (light/dark) with the rest of the dashboard.

📦 Installation

Once published to ArtifactHub, install via the Headlamp Plugin Catalog (search for "Agones"). Manual installation instructions are in the README.

⚠️ Known Limitations

• Alpha quality - expect rough edges; please file bugs!
• Read-mostly UI for now: allocation is the main write operation. Delete actions, map icons, and pod detail injection are on the roadmap.

🙏 Thanks

Built as part of the LFX Mentorship programme with guidance from @markmandel, @illume, @lacroixthomas, and @ashu8912. Thanks also to @Fire-furo for the Fleet link navigation fix, and to @manumathon for the early CI groundwork.