fleet/changes/16842-scripts-add-delete

- Adds backend functionality to work with the new way of storing script contents
- Updates the script character limit from 10,000 to 500,000
feat: adding, reading, and deleting flows for scripts updated to use new table (#17305) > Related issues: #16842, #16843 # Checklist for submitter If some of the following don't apply, delete the relevant line. <!-- Note that API documentation changes are now addressed by the product design team. --> - [x] Changes file added for user-visible changes in `changes/` or `orbit/changes/`. See [Changes files](https://fleetdm.com/docs/contributing/committing-changes#changes-files) for more information. - [x] Input data is properly validated, `SELECT *` is avoided, SQL injection is prevented (using placeholders for values in statements) - [x] Added/updated tests - [x] If database migrations are included, checked table schema to confirm autoupdate - For database migrations: - [x] Checked schema for all modified table for columns that will auto-update timestamps during migration. - [x] Confirmed that updating the timestamps is acceptable, and will not cause unwanted side effects. - [x] Manual QA for all new/changed functionality 2024-03-04 16:00:08 +00:00			`- Adds backend functionality to work with the new way of storing script contents`
			`- Updates the script character limit from 10,000 to 500,000`