Dynamically ask user to fill webdash.json with current defaults

[jadjoubran]

Rather than asking the user, guess these values just like Workbox does by searching the project directory for a manifest.json (for example)

[jadjoubran]

fs-finder or find-in-files

[jadjoubran]

Files & folders: find

[jadjoubran]

• [x] src
• [x] dist
• [x] jsBudgetLimit
• [x] jsBudgetPath
• [x] manifestPath
• [x] readableAssets
• [x] generate json config rather than copying file
• [x] refactor into lib

[jadjoubran]

Fix:

 "jsBudgetPath": ".//Users/....com/dist/js/*.js",
 "manifestPath": "./build/default/manifest.json",

knowing that dist is ./dist/

[jadjoubran]

✅