Format time values

[ollietulloch]

This PR adds the ability to format incoming date-like strings with time components to a Time object.

Previously behaviour:

Value:
'2025-06-01T10:15:36+01:00'

Mapping:

- column: time_field
  mappings:
  - field: time_field
    format: "%Y-%m-%dT%H:%M:%S%:z"

Result:
Sun, 01 Jun 2025 00:00:00 +0100

New behaviour:

Value:
'2025-06-01T10:15:36+01:00'

Mapping:

- column: time_field
  mappings:
  - field: time_field
    format: "%Y-%m-%dT%H:%M:%S%:z"
    time: true

Result:
2025-06-01 10:15:36 +0100

The linting issues have not been introduced by this PR.

[suezhou]

LGTM