refactor(core): move i18n logic into its dedicated package (#61425)

Move the i18n-related logic out of the instructions folder into
the i18n-dedicated folder / package.

PR Close #61425

packages/core/src/hydration/i18n.ts

@@ -8,7 +8,7 @@
 
 import {inject, Injector} from '../di';
 import {isRootTemplateMessage} from '../render3/i18n/i18n_util';
-import {createIcuIterator} from '../render3/instructions/i18n_icu_container_visitor';
+import {createIcuIterator} from '../render3/i18n/i18n_icu_container_visitor';
 import {I18nNode, I18nNodeKind, I18nPlaceholderType, TI18n, TIcu} from '../render3/interfaces/i18n';
 import {isTNodeShape, TNode, TNodeType} from '../render3/interfaces/node';
 import type {Renderer} from '../render3/interfaces/renderer';

packages/core/src/render3/i18n/i18n_icu_container_visitor.ts

@@ -9,7 +9,7 @@
 import {assertDomNode, assertNumber, assertNumberInRange} from '../../util/assert';
 import {EMPTY_ARRAY} from '../../util/empty';
 import {assertTIcu, assertTNodeForLView} from '../assert';
-import {getCurrentICUCaseIndex} from '../i18n/i18n_util';
+import {getCurrentICUCaseIndex} from './i18n_util';
 import {I18nRemoveOpCodes, TIcu} from '../interfaces/i18n';
 import {TIcuContainerNode} from '../interfaces/node';
 import {RNode} from '../interfaces/renderer_dom';

packages/core/src/render3/i18n/i18n_parse.ts

@@ -25,7 +25,7 @@ import {
   assertString,
 } from '../../util/assert';
 import {CharCode} from '../../util/char_code';
-import {loadIcuContainerVisitor} from '../instructions/i18n_icu_container_visitor';
+import {loadIcuContainerVisitor} from './i18n_icu_container_visitor';
 
 import {getDocument} from '../interfaces/document';
 import {