chore: Update Field spec for FieldContext

[behowell]

New Behavior

Update Field's spec.md to describe the new method of passing field state via context instead of setting props directly on the child.

Related Issue(s)

• feat: Add FieldContext to pass props to controls inside Field #27399

[fabricteam]

📊 Bundle size report

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-checkbox Checkbox	37.02 kB 11.255 kB
react-combobox Combobox (including child components)	89.718 kB 28.49 kB
react-combobox Dropdown (including child components)	88.402 kB 28.217 kB
react-components react-components: Button, FluentProvider & webLightTheme	67.994 kB 18.395 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	207.512 kB 57.555 kB
react-components react-components: FluentProvider & webLightTheme	38.819 kB 12.351 kB
react-datepicker-compat DatePicker Compat	251.272 kB 67.329 kB
react-field Field	21.509 kB 7.408 kB
react-input Input	26.707 kB 8.113 kB
react-portal-compat PortalCompatProvider	6.446 kB 2.185 kB
react-progress ProgressBar	16.322 kB 5.822 kB
react-radio Radio	35.48 kB 11.126 kB
react-radio RadioGroup	18.889 kB 6.929 kB
react-select Select	27.915 kB 9.189 kB
react-slider Slider	36.845 kB 11.474 kB
react-spinbutton SpinButton	36.615 kB 10.757 kB
react-switch Switch	32.438 kB 9.706 kB
react-table DataGrid	150.829 kB 41.052 kB
react-table Table (Primitives only)	47.119 kB 12.703 kB
react-table Table as DataGrid	138.971 kB 35.722 kB
react-table Table (Selection only)	86.8 kB 21.742 kB
react-table Table (Sort only)	86.13 kB 21.549 kB
react-textarea Textarea	30.108 kB 9.478 kB

_{🤖 This report was generated against d8f32b68ec87fa322f72616f3e9d21cb679cc205}

[codesandbox-ci]

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Latest deployment of this branch, based on commit 14a247a:

Sandbox	Source
@fluentui/react 8 starter	Configuration
@fluentui/react-components 9 starter	Configuration

[fabricteam]

Perf Analysis (@fluentui/react-components)

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	694	698	5000
Button	mount	382	371	5000
Field	mount	1259	1256	5000
FluentProvider	mount	908	875	5000
FluentProviderWithTheme	mount	116	119	10
FluentProviderWithTheme	virtual-rerender	96	104	10
FluentProviderWithTheme	virtual-rerender-with-unmount	108	113	10
InfoButton	mount	20	24	5000
MakeStyles	mount	1134	1115	50000
Persona	mount	1999	1984	5000
SpinButton	mount	1578	1581	5000

[size-auditor]

Asset size changes

Size Auditor did not detect a change in bundle size for any component!

Baseline commit: d8f32b68ec87fa322f72616f3e9d21cb679cc205 (build)

[fabricteam]

🕵 fluentuiv9 No visual regressions between this PR and main