docs-bug(chips): the "form example" is not fully related to forms

[sovtara]

Documentation Feedback

We have chips-form-control-example, chips-reactive-form-example components that intend to illustrate how chips interact with the form control.
I see 2 problems here.

1. The interaction with mat-chip-grid is happening not fully through the formControl. For now the source of chips's list is keywords signal, not the formControl: @for (keyword of keywords(); track keyword) {
   It seems we should take the formControl as the source of chips's list (not the signal): @for (keyword of formControl.value || []; track keyword) {
   Moreover we could get rid of the signal, because the goal of the example is to show the interaction between the formControl and the chips in the template.

2. These two examples of chips-form-control-example and chips-reactive-form-example components duplicate each other. They have the same logic inside of components classes. So it seems we could leave only one of these two examples.

Affected documentation page

https://material.angular.dev/components/chips/examples

[omkumar739]

We can try this..
Keep a single example (preferably chips-reactive-form-example)

Remove or consolidate the other example

Alternatively, if both are kept, they should demonstrate distinct approaches (e.g. template-driven vs reactive), which is not the case today