chore: adds major version change log

MAJOR_VERSIONS.md

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+# Dozzle Major Version Highlights
+
+A summary of major features introduced with each major version bump since 2020.
+
+## v2.0.0 — 2020-06-27
+
+- Theme overhaul using CSS variables
+- Progress notification bar
+- Toggle between new light and dark themes
+
+## v3.0.0 — 2020-09-06
+
+- Live container stats (CPU/memory) streamed in real time
+- Pinned tabs and improved mobile/responsive layout
+- Major UI overhaul
+
+## v4.0.0 — 2022-08-17
+
+- First-class JSON log support
+- Jump-to-context, soft wraps, clear-logs action
+- Auto color scheme, dark mode polish
+- Container stats panel, total CPU/mem usage
+- Healthcheck endpoint and "wait for docker" startup option
+
+## v5.0.0 — 2023-09-23
+
+- Multi-host support with parallel client connections
+- New homepage dashboard with all containers, sortable table, pagination, bar charts
+- Exponential moving average for stats
+- Container pinning, keyboard shortcut overlay
+- stdout/stderr stream separation
+- i18n: Chinese, German added; locale infrastructure
+- Refactored UI with faster components
+
+## v6.0.0 — 2024-01-01
+
+- **Forward-proxy authentication** (Authelia, etc.) and `users.yml` file-based auth
+- Container actions: start/stop/restart from the UI
+- Hot-reload of users.yml without restart
+- Custom headers for forward-proxy auth
+- Settings synced to disk for authenticated users
+- Toast notifications, release list, redirect-to-new-container
+- Removed legacy auth model (breaking)
+
+## v7.0.0 — 2024-05-24
+
+- **Docker Swarm mode** with stacks and services on remote hosts
+- Host cards on dashboard with per-host stats
+- Container grouping by stack/compose
+- Background stats collection (up to 5 min) with idle deactivation
+- LogFmt parser support
+- Compact mode, draggable search, alt-click split panes
+- Many new locales (French, Italian, Polish, Danish, Turkish, …)
+- `generate` subcommand for users.yml
+
+## v8.0.0 — 2024-07-05
+
+- **Swarm mode rebuilt on gRPC agents** (breaking architecture change)
+- Critical/severe log levels
+- Stacks and services in fuzzy search
+- Improved search with full match scrolling
+- Container start events shown inline
+
+## v9.0.0 — 2026-01-06
+
+- **Kubernetes mode** with k8s-specific menu
+- **User roles** and `dozzle_*` role mapping; logout URL for forward proxy
+- Historical stats on homepage, hosts, and containers
+- Permanent links to specific past log lines
+- Grouping by `dev.dozzle.group` label, log message grouping
+- Shell resize support, action toolbar in menu
+- Settings page, collapsible side menu sections
+- Parallel container fetching, gRPC compression
+- CLEF (`@l`) log level extraction
+- New locales: Korean, Indonesian, Dutch
+
+## v10.0.0 — 2026-02-10
+
+- **Dozzle Cloud** integration (bidirectional gRPC tool execution)
+- **Notifications & alerts**: full notifications page, webhooks, dispatchers, Go template support, test connections
+- Notifications work across agents
+- Per-container network usage stats (with mobile view)
+- Coolify label fallbacks for container name/group
+- Alert creation shortcut, JSON syntax in templates