Add new `EntityMapperTaskPlugin` for context-to-entity mapping

[Zorin95670]

Description:

Introduce a new plugin named EntityMapperTaskPlugin (code name: emtp) to enable mapping values from the execution context into an entity.

This plugin should allow flexible configuration to extract data from the context and assign it to corresponding entity fields.

Proposed Configuration:

task:
  - name: X
    type: entity-mapper
    mapping:
      id: '{{context.response.id}}'

Requirements:

• Implement a new task plugin identified by type: entity-mapper
• Support mapping of context values using template expressions (e.g. {{context.response.id}})
• Allow multiple field mappings within the mapping object
• Ensure compatibility with existing task execution flow

Expected Behavior:

• During task execution, the plugin reads values from the context
• Applies the defined mappings
• Populates the target entity with the resolved values

Notes:

• Code name for internal reference: emtp
• Consider extensibility for future mapping transformations if needed