Feat - Add configurable table question type

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !43740
• Here is a brief description of what this PR does

Adds a new Table question type to the plugin, letting form
designers collect tabular data with fully configurable columns.

Changes

• Configurable columns: each column has a label, a cell type (reusing a compatible core question type), an optional item type, and a "required" flag.
• Configurable rows: min/max row count, with end users adding/removing rows dynamically.
• End-user input: renders an editable table; select-based cells (users, items, devices…) use select2.
• Answer display: stored answers are rendered back as a clean read-only table.
• Required-column validation:
  • Server-side (authoritative) via QuestionTypeValidationInterface — blocks submission when a filled row leaves a required cell empty.
  • Client-side — highlights only the offending cells (red border + message) and blocks the submit before the server round-trip.
• Disabled by default; enabled from the plugin configuration like the other advanced question types.

Tests

• Unit + integration tests for config (de)serialization, compatible types, cell rendering, editor/helpdesk rendering, and required-column validation across every compatible column type.

Screenshots (if appropriate):

Fill form exemple :

[RomainLvr]

@ccailly suggested making the column limit a validation criterion (like those already present in Forms) rather than managing it manually. The benefits would be:

• Easier and more robust
• Useful in other situations to have this new criterion

[stonebuzz]

Missing test for validateExtraDataInput()

We need two test cases (at least): one confirming the method accepts max_rows=50, and one confirming it rejects max_rows=51.

[ccailly]

@ccailly suggested making the column limit a validation criterion (like those already present in Forms) rather than managing it manually. The benefits would be:

* Easier and more robust

* Useful in other situations to have this new criterion

In addition to avoiding the need to redevelop the line count validation system, adding conditions based on the number of lines will also allow users to set visibility conditions based on the number of lines.

[stonebuzz]

Awaiting customer validation