Add FocusNode to ZetaSearchBar

[ps9310]

• adds new property FocusNode to ZetaSearchBar
• adds a fix to update text controller when initial value is changed

[github-actions]

PR Checks complete

• ✅ - Linting / Formatting
• ✅ - Static analysis passed
• ✅ - All tests passed
• ✅ - Branch is not behind
• 📈 - Code coverage: 29.07% (no change)
  
  See details

  File Name	%	Passing?
  lib/src/theme/contrast.dart	100%	✅
  lib/src/theme/theme_data.dart	100%	✅
  lib/src/zeta.dart	100%	✅
  lib/src/components/accordion/accordion.dart	71.6%	⛔️
  lib/src/utils/rounded.dart	100%	✅
  lib/src/components/avatars/avatar.dart	0%	⛔️
  lib/src/components/badges/indicator.dart	98.3%	✅
  lib/src/components/badges/label.dart	100%	✅
  lib/src/components/badges/priority_pill.dart	100%	✅
  lib/src/components/badges/status_label.dart	100%	✅
  lib/src/components/badges/tag.dart	98.3%	✅
  lib/src/components/banner/banner.dart	0%	⛔️
  lib/src/components/bottom sheets/bottom_sheet.dart	0%	⛔️
  lib/src/components/bottom sheets/menu_items.dart	0%	⛔️
  lib/src/components/breadcrumbs/breadcrumbs.dart	0%	⛔️
  lib/src/components/button_group/button_group.dart	0%	⛔️
  lib/src/components/buttons/button.dart	97.2%	✅
  lib/src/components/buttons/button_style.dart	100%	✅
  lib/src/components/buttons/icon_button.dart	0%	⛔️
  lib/src/components/buttons/input_icon_button.dart	0%	⛔️
  lib/src/components/chat_item/chat_item.dart	0%	⛔️
  lib/src/components/checkbox/checkbox.dart	96.6%	✅
  lib/src/components/chips/assist_chip.dart	0%	⛔️
  lib/src/components/chips/chip.dart	0%	⛔️
  lib/src/components/chips/filter_chip.dart	0%	⛔️
  lib/src/components/chips/input_chip.dart	0%	⛔️
  lib/src/components/contact_item/contact_item.dart	0%	⛔️
  lib/src/components/date_input/date_input.dart	0%	⛔️
  lib/src/interfaces/form_field.dart	100%	✅
  lib/src/components/dial_pad/dial_pad.dart	100%	✅
  lib/src/components/dialog/dialog.dart	0%	⛔️
  lib/src/components/dropdown/dropdown.dart	0%	⛔️
  lib/src/components/fabs/fab.dart	96.8%	✅
  lib/src/components/filter_selection/filter_selection.dart	0%	⛔️
  lib/src/components/global_header/global_header.dart	0%	⛔️
  lib/src/components/global_header/header_tab_item.dart	0%	⛔️
  lib/src/components/icon/icon.dart	100%	✅
  lib/src/components/in_page_banner/in_page_banner.dart	100%	✅
  lib/src/components/list_item/dropdown_list_item.dart	0%	⛔️
  lib/src/components/list_item/list_scope.dart	0%	⛔️
  lib/src/components/list_item/list_item.dart	0%	⛔️
  lib/src/components/list_item/notification_list_item.dart	0%	⛔️
  lib/src/components/navigation bar/navigation_bar.dart	0%	⛔️
  lib/src/components/navigation_rail/navigation_rail.dart	0%	⛔️
  lib/src/components/pagination/pagination.dart	0.7%	⛔️
  lib/src/components/password/password_input.dart	100%	✅
  lib/src/components/phone_input/countries.dart	10%	⛔️
  lib/src/components/phone_input/countries_dialog.dart	0%	⛔️
  lib/src/components/phone_input/phone_input.dart	0%	⛔️
  lib/src/components/progress/progress.dart	0%	⛔️
  lib/src/components/progress/progress_bar.dart	0%	⛔️
  lib/src/components/progress/progress_circle.dart	0%	⛔️
  lib/src/components/radio/radio.dart	0%	⛔️
  lib/src/components/screen_header_bar/screen_header_bar.dart	0%	⛔️
  lib/src/components/search_bar/search_bar.dart	100%	✅
  lib/src/components/segmented_control/segmented_control.dart	0%	⛔️
  lib/src/components/select_input/select_input.dart	0%	⛔️
  lib/src/components/slider/slider.dart	0%	⛔️
  lib/src/components/snack_bar/snack_bar.dart	0%	⛔️
  lib/src/components/stepper/stepper.dart	0%	⛔️
  lib/src/components/stepper_input/stepper_input.dart	0%	⛔️
  lib/src/components/switch/material_switch.dart	0%	⛔️
  lib/src/components/switch/zeta_switch.dart	0%	⛔️
  lib/src/components/tabs/tab.dart	0%	⛔️
  lib/src/components/tabs/tab_bar.dart	0%	⛔️
  lib/src/components/text_input/text_input.dart	53.7%	⛔️
  lib/src/components/time_input/time_input.dart	0%	⛔️
  lib/src/components/tooltip/tooltip.dart	98.8%	✅
  lib/src/components/top_app_bar/extended_top_app_bar.dart	0%	⛔️
  lib/src/components/top_app_bar/search_top_app_bar.dart	0%	⛔️
  lib/src/components/top_app_bar/top_app_bar.dart	0%	⛔️
  lib/src/theme/breakpoints.dart	100%	✅
  lib/src/theme/color_extensions.dart	100%	✅
  lib/src/theme/color_swatch.dart	100%	✅
  lib/src/theme/color_scheme.dart	100%	✅
  lib/src/theme/colors.dart	100%	✅
  lib/src/utils/debounce.dart	100%	✅
  lib/src/utils/extensions.dart	100%	✅
  lib/src/utils/nothing.dart	100%	✅
  lib/src/zeta_provider.dart	88.3%	⛔️

_{Created with Flutter code quality action}

[github-actions]

Visit the preview URL for this PR (updated for commit 3e363c3):

https://zeta-flutter-main--pr-132-feat-zeta-search-bar-focus-b6pcvsmf.web.app

_{(expires Fri, 19 Jul 2024 23:42:23 GMT)}

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_{Sign: 5ca681de0a0ad9185b252304c113355d5ee04ca6}