Allow ordering of the hook callbacks.

[jansiegel]

Context

This PR introduces the option of adding an "order index" to the hook callbacks.

• If the order index is > 0, the callback will be added after the others. For example, with an index of 1, the callback will be added before the ones with an index of 2, 3, etc., but after the ones with an index of 0 and lower.
• If the order index is < 0, the callback will be added before the others. For example, with an index of -1, the callback will be added after the ones with an index of -2, -3, etc., but before the ones with an index of 0 and higher.
• If the order index is 0 or no order index is provided, the callback will be added between the "negative" and "positive" indexes.

How has this been tested?

Added a test case for the manualColumnResize + nestedHeaders feature from handsontable/dev-handsontable#770

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature or improvement (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Additional language file or change to the existing one (translations)

Related issue(s):

1. handsontable/dev-handsontable#770

Affected project(s):

• handsontable
• @handsontable/angular
• @handsontable/react
• @handsontable/vue
• @handsontable/vue3

Checklist:

• I have reviewed the guidelines about Contributing to Handsontable and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement
• My change requires a change to the documentation.

[github-actions]

Launch the local version of documentation by running:

npm run docs:review ddd18f85775cd071ac1327d7bc0fbf307216dec5

[budnix]

If you try to use the hook name under the same name, you will get an error hot.addHook('_order', () => {}). Did you consider using WeakMap here?