[FR]: Add the self referencing this variable to the component

[cmd-sam]

Is your feature request related to a problem? Please describe.

self referencing makes it easier to reuse the template code

Describe the solution you'd like

add this variable

Describe alternatives you've considered

No response

Additional context

this is an example on how I would like to use the "this" variable.

  homeassistant:
    customize:
      package.node_anchors:
        common: &common
          package: template_thermostats
        <<: &config_general
  
          modes:
            - "auto"
            - "heat"
            - "off"
          min_temp: 5
          max_temp: 30

          # get current temp.
          current_temperature_template: >
            {% set entity = this.entity_id | regex_replace('_template', '') %}

            {{ state_attr(entity,'current_temperature')|float(0) }}
            
          # get target temp
          target_temperature_template: >
            {% set entity = this.entity_id | regex_replace('_template', '') %}

            {{ state_attr(entity,'temperature')|float(0) }}

          # set target temp
          set_temperature:
          - service: climate.set_temperature
            data:
              temperature: "{{ temperature | float(0) }}"
            target:
              entity_id: >
                {% set entity = this.entity_id | regex_replace('_template', '') %}
                {{ entity }}

          # set target temp
          set_hvac_mode:
          - variables:
              automation_id: >
                {% set room = this.entity_id | regex_replace('climate.thermostat_|_template', '') %}

                automation.{{room}}_heizung_automatik
              entity_id: >
                {% set entity = this.entity_id | regex_replace('_template', '') %}
                {{ entity }}
          - alias: "choose mode"
            choose:
            - conditions: "{{ hvac_mode == 'auto' }}"
              sequence:
              - service: automation.turn_on
                target:
                  entity_id: "{{ automation_id }}"
              - service: automation.trigger
                target:
                  entity_id: "{{ automation_id }}"
            - conditions: "{{ hvac_mode == 'heat' }}"
              sequence:
              - service: automation.turn_off
                target:
                  entity_id: "{{ automation_id }}"
            default:
              - service: automation.turn_off
                target:
                  entity_id: "{{ automation_id }}"
              - service: climate.set_temperature
                target:
                  entity_id: "{{ entity_id }}"
                data:
                  temperature: 5

          availability_template: >
            {% set entity = this.entity_id | regex_replace('_template', '') %}
            {{ states(entity) not in ['unavailable'] }}

          target_temperature_high_template: >
            {% set entity = this.entity_id | regex_replace('_template', '') %}
            {{ state_attr(entity,'max_temp') }}

          target_temperature_low_template: >
            {% set entity = this.entity_id | regex_replace('_template', '') %}
            {{ state_attr(entity,'min_temp') }}
          
          temp_step: 0.5


  climate:

  - platform: climate_template
    name: Thermostat Flur Oben Template
    unique_id: ad143f13-699d-4f5c-84ce-6fc0c5b9c192
    <<: *config_general

  - platform: climate_template
    name: Thermostat Wohnzimmer Template
    unique_id: fdd7ebd6-8ab6-4c85-bdc1-47efd5149ba7
    <<: *config_general