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/constants/paths.ts

@@ -0,0 +1,22 @@
+import { homedir } from "node:os";
+import { join } from "node:path";
+
+const home = homedir();
+
+export const PATHS = {
+  CONFIG_DIR: process.env.CLAUDEMESH_CONFIG_DIR || join(home, ".claudemesh"),
+  get CONFIG_FILE() {
+    return join(this.CONFIG_DIR, "config.json");
+  },
+  get AUTH_FILE() {
+    return join(this.CONFIG_DIR, "auth.json");
+  },
+  get KEYS_DIR() {
+    return join(this.CONFIG_DIR, "keys");
+  },
+  get LAST_USED_FILE() {
+    return join(this.CONFIG_DIR, "last-used.json");
+  },
+  CLAUDE_JSON: join(home, ".claude.json"),
+  CLAUDE_SETTINGS: join(home, ".claude", "settings.json"),
+} as const;