chore(cli-v2): un-ignore CLI source tree for binary release workflow

The CLI source (242 files, ~14k lines) was gitignored during the
earlier cli→cli-v2 reorg so only the published npm package carried it.
That blocks the GitHub Actions release workflow (release-cli.yml),
which clones the repo fresh on each runner and needs the source to
compile binaries via `bun build --compile`.

Moves the gitignore from root-level to `apps/cli-v2/.gitignore` with
only the usual build artefacts excluded (node_modules, dist, .turbo,
.cache). Source is now in git at apps/cli-v2/src/.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli-v2/src/locales/en.ts

@@ -0,0 +1,10 @@
+export const en = {
+  welcome: "Welcome to claudemesh",
+  signed_in_as: "Signed in as {name}",
+  mesh_created: 'Created "{slug}"',
+  invite_copied: "Invite URL copied to clipboard",
+  logout_success: "Signed out",
+  error_network: "Could not reach {url}. Check your connection.",
+  error_auth: "Authentication failed. Run \`claudemesh login\` to sign in.",
+  error_not_found: "{resource} not found",
+} as const;

apps/cli-v2/src/locales/index.ts

@@ -0,0 +1 @@
+export { en } from "./en.js";