fix: read CLI version from package metadata

[immanuwell]

Fixes a tiny papercut: dokploy --version was stuck on 0.3.0, while the package is 0.29.2. ngl this can make releases look stale.

Repro before:

pnpm build
node dist/index.js --version
node -p "require('./package.json').version"

Before: 0.3.0 vs 0.29.2.

Now the CLI reads package.json at runtime, and the test checks the exact package version so it wont drift again.

Checked:

pnpm build
pnpm test
pnpm exec biome check src/index.ts tests/cli.test.ts

No exact issue found for this one, just related stale-version/outdated CLI threads.