Initial StartOS package for Station Master (v0.5.1)

Built from source via a git submodule pinned to a tag, not a published image
— the Dockerfile, main.ts, and manifest should never need to change for an
ordinary version bump, only the submodule pin (see UPDATING.md). One volume,
one interface serving the browser client + lobby/intent API + SSE stream
from a single origin, no dependencies. The server-wide join secret (D14) is
seeded on install, exposed via the Get Join Secret action, and blocks start
behind a critical task until retrieved — the same first-set/rotation pattern
as actual-budget-startos's admin password.

Verified on phoenix.local: installs, the critical task correctly blocks an
ordinary start, force-starting confirms the daemon binds its port and serves
the client, and store.json correctly holds the install-seeded join secret.
Not verified: the Get Join Secret action's execution end-to-end — start-cli's
`package action run` fails with a client-side deserialization error that
reproduces identically against actual-budget's already-shipped equivalent
action, so this looks like a start-cli issue rather than a defect here.

icon.svg is still the scaffold's hello-world placeholder — no real Station
Master icon exists yet to ship in its place.

startos/i18n/dictionaries/default.ts

@@ -0,0 +1,24 @@
+export const DEFAULT_LANG = 'en_US'
+
+const dict = {
+  // main.ts
+  'Starting Station Master!': 0,
+  'Multiplayer Server': 1,
+  'The multiplayer server is ready': 2,
+  'The multiplayer server is not ready': 3,
+  // interfaces.ts
+  'Multiplayer Table': 4,
+  'Create or join a game, and play in the browser': 5,
+  // actions/getJoinSecret.ts
+  'Get Join Secret': 6,
+  'Retrieve or rotate the secret players need to create or join a game': 7,
+  // init/generateJoinSecret.ts
+  'Get the join secret to share with players': 8,
+} as const
+
+/**
+ * Plumbing. DO NOT EDIT.
+ */
+export type I18nKey = keyof typeof dict
+export type LangDict = Record<(typeof dict)[I18nKey], string>
+export default dict