Merge Luma launcher fork into monorepo

Move trampoline files (boot-hook, watcher, overlay) into trampoline/
subdirectory. Add upstream Luma v2.3.1 source at repo root with our
additions:

- Page::Ha (4th nav tab) with placeholder empty state
- HA tab config schema and default entity mapping (ha-home/)
- Nav keys renamed: "home" → "start", new "ha" tab between Apps and Settings
- All state.rs/view.rs/main.rs/tests.rs updated for 4-tab navigation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.changeset/README.md

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+# Changesets
+
+Run `pnpm changeset` in a feature or fix branch, select `lg-luma`, choose a patch, minor or major
+bump, and describe the user-facing change. Commit the generated Markdown file with the PR.
+Documentation-only and maintenance PRs that do not need a release can omit a changeset.
+
+PRs receive an updating Changesets status comment. It reports the requested version bump or
+notes that no changeset was committed and no version bump is requested. Code or behavior changes
+should include a changeset: patch for compatible fixes, minor for compatible features, or major
+for breaking changes. The comment is informational and also works on fork PRs.
+
+Merged changesets accumulate in the automated **Version Packages** PR. Its version command
+updates `package.json`, `CHANGELOG.md`, `appinfo.json`, the root `Cargo.toml`, the `luma` entry in
+`Cargo.lock`, and the versioned IPK examples in `readme.md`. Supporting Rust crates keep their
+own versions. Do not run `pnpm version:release` in ordinary feature PRs.
+
+The version PR receives the same CI checks as other PRs. Merging it into `main` publishes the
+verified IPK and Homebrew feed after CI passes. Other merges and manual CI runs do not publish.
+See [the release guide](../development.md#releases) for repository setup and details.

.changeset/config.json

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+{
+  "$schema": "https://unpkg.com/@changesets/config@4.0.1/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": [],
+  "format": "oxfmt",
+  "privatePackages": {
+    "version": true,
+    "tag": false
+  }
+}

.changeset/italian-translation.md

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+---
+'lg-luma': minor
+---
+
+Add Italian (`it`) translation: full `messages.json` catalog, plus locale registration in `i18n.rs` (language list, display name, and localized date formatting).

.changeset/norwegian-streaming-logos.md

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+---
+'lg-luma': minor
+---
+
+Add curated vector cards for NRK TV and TV 2 Play, with exact app-ID matching, card colours, and desktop demo support.