[BUG] Hindi (हिंदी) translation incomplete - several UI strings still in English

### Description
The Hindi locale file is missing translations for several UI strings, causing English text to appear when the app is set to Hindi.

### Missing Translations (identified)
- `Export saved data`
- `Clear cache`
- `Show datatype`
- `Snap to grid`
- `Show relationship labels`
- `Show debug coordinates`
- `DBML view`
- `Docs`
- And 40+ other keys missing from [hi.js](cci:7://file:///Users/nityajain/Desktop/open%20source/drawdb/src/i18n/locales/hi.js:0:0-0:0)

### Screenshots
[Attach your screenshots showing English text in Hindi UI]

### Expected Behavior
All UI elements should display in Hindi when Hindi language is selected.

### Impact
Hindi is spoken by 600+ million people - the 3rd most spoken language globally. Complete translation improves accessibility for a massive user base.

**Additional context**
Add any other context about the problem here. If the bug involves the import feature, please, attach the imported file.