fix(orders): fix error when weight is a string

[EdieLemoine]

INT-552

Closes #256

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 45.30%. Comparing base (f627a21) to head (c9e72c1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## beta #261 +/- ## ======================================= Coverage 45.30% 45.30% ======================================= Files 146 146 Lines 3571 3571 Branches 55 55 ======================================= Hits 1618 1618 Misses 1898 1898 Partials 55 55 ``` | [Flag](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | Coverage Δ | | |---|---|---| | [admin](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | `0.00% <ø> (ø)` | | | [backend](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | `74.32% <100.00%> (ø)` | | | [checkout](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | `0.00% <ø> (ø)` | | | [frontend](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | `0.00% <ø> (ø)` | | | [unit](https://app.codecov.io/gh/myparcelnl/prestashop/pull/261/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl) | `45.30% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=myparcelnl#carryforward-flags-in-the-pull-request-comment) to find out more.

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[myparcel-bot[bot]]

PDK upgrade summary

The following packages were upgraded:

Package	Old version	New version
@myparcel-pdk/admin	1.0.0	1.1.0
@myparcel-pdk/admin-component-tests	1.0.0	1.1.0
@myparcel-pdk/admin-preset-bootstrap4	1.0.0	1.1.1
@myparcel-pdk/admin-preset-default	1.0.0	1.2.0
@myparcel-pdk/app-builder	1.2.1	1.3.0
@myparcel-pdk/checkout	1.0.0	1.0.4
myparcelnl/pdk	2.36.2	2.39.3

[myparcel-bot[bot]]

✅ Build successful!

You can find a link to the downloadable artifact below.

Name	Link
Commit	c9e72c11ee98849026a17dd01bb18bbaf1bb61f6
Logs	https://github.com/myparcelnl/prestashop/actions/runs/9956985568
Download	https://github.com/myparcelnl/prestashop/suites/26059492543/artifacts/1706201338