[IMP] hr_recruitment: Add kanban state to recruitment pipeline

Purpose
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recruitment pipeline lacks a kanban state management

Specifications
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Add kanban state management like what is already done in project:
- A kanban state was added to the recruitment pipeline. The kanban colored dot is visible in the kanban view and in the form view.
- A search filter on the kanban state was also added.

Project : RD for Dummies
Task : 1819164