feat(chip): add outlined version

[adrianptrv]

Closes IgniteUI/igniteui-theming#591

Description

Type of Change (check all that apply):

• New functionality
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Tests

Component(s) / Area(s) Affected:

Chip

How Has This Been Tested?

• Unit tests
• Manual testing

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR contains breaking changes

[Copilot]

Pull request overview

This PR introduces an outlined visual variant for the Chip component across themes, updates the underlying theming tokens for focus styling (breaking change), and provides a v22.2.0 migration + tests to automatically update affected theme usages.

Changes:

• Adds outlined API to IgxChipComponent and exercises it in unit tests.
• Extends chip theming SCSS across shared + dark theme variants to support outlined styling and updates focus token names.
• Adds a v22.2.0 migration (migration-59) to rename chip-theme focus token properties, plus changelog + sample updates.

Reviewed changes

Copilot reviewed 19 out of 20 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/app/chips/chips.sample.scss	Adjusts sample layout to include outlined chips in the grid.
src/app/chips/chips.sample.html	Adds outlined chip examples for Angular + Web Components samples.
projects/igniteui-angular/migrations/update-22_2_0/index.ts	Registers the v22.2.0 migration entry point.
projects/igniteui-angular/migrations/update-22_2_0/index.spec.ts	Adds a schematic test ensuring the token renames occur.
projects/igniteui-angular/migrations/update-22_2_0/changes/theme-changes.json	Defines the token rename rules for chip-theme.
projects/igniteui-angular/migrations/migration-collection.json	Registers migration-59 for v22.2.0.
projects/igniteui-angular/chips/src/chips/themes/shared/_indigo.scss	Updates focus token usage and adds outlined styling overrides.
projects/igniteui-angular/chips/src/chips/themes/shared/_fluent.scss	Adds outlined styling overrides for Fluent shared theme.
projects/igniteui-angular/chips/src/chips/themes/shared/_bootstrap.scss	Updates focus token usage and adds outlined styling overrides.
projects/igniteui-angular/chips/src/chips/themes/dark/_material.scss	Adds dark Material outlined overrides.
projects/igniteui-angular/chips/src/chips/themes/dark/_indigo.scss	Adds dark Indigo outlined overrides and disabled outlined handling.
projects/igniteui-angular/chips/src/chips/themes/dark/_index.scss	Wires dark theme entry points for material/bootstrap/fluent/indigo.
projects/igniteui-angular/chips/src/chips/themes/dark/_fluent.scss	Adds dark Fluent outlined overrides.
projects/igniteui-angular/chips/src/chips/themes/dark/_bootstrap.scss	Adds dark Bootstrap outlined overrides.
projects/igniteui-angular/chips/src/chips/themes/_base.scss	Adds base outlined styling behavior and adjusts border behavior for filled chips.
projects/igniteui-angular/chips/src/chips/chip.spec.ts	Adds a unit test verifying the outlined host class is applied.
projects/igniteui-angular/chips/src/chips/chip.component.ts	Introduces the outlined input and host class binding.
package.json	Bumps igniteui-theming dependency to ^28.0.0-beta.4.
package-lock.json	Updates lockfile to reflect the igniteui-theming@28.0.0-beta.4 resolution.
CHANGELOG.md	Adds v22.2.0 notes including outlined chip and theming token rename breaking change.

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