Ensure that expressions are evaluated using paths relative to the project root#34

User reported that they are seeing these logs repeat over and over: ``` [18:21:34.779] 1ms debug @turbowatch #subscribe: build (3f923bd4): 21 files changed; showing first 10 files: - /Users/juls/src/contra/gaia/packages/money/.dist - /Users/juls/src/contra/gaia/packages/money/.dist/currencies.js.map - /Users/juls/src/contra/gaia/packages/money/.dist/currencies.js - /Users/juls/src/contra/gaia/packages/money/.dist/currencies.d.ts.map ``` Their Turbowatch script was: ```ts import { defineConfig } from 'turbowatch'; export default defineConfig({ project: __dirname, triggers: [ { expression: [ 'anyof', [ 'allof', ['dirname', 'node_modules'], ['dirname', 'dist'], ['match', '*'], ], [ 'allof', ['not', ['dirname', 'node_modules']], ['dirname', 'src'], ['match', '*'], ], ], interruptible: true, name: 'build', onChange: async ({ spawn }) => { await spawn`pnpm run build`; }, }, ], }); ``` The non-obvious catch is that `/Users/juls/src/contra/gaia/packages/money/.dist` path includes `src` outside of the project root. This was obviously not intended. The fix to match expressions against a path relative to project root.