feat(components): add textbox component

Description

Add the textbox, a component representing an input field for entering/editing string values, and the debounced input, a base class for input components with debounced value updates, to the component library.

Closes #48

What's been done?

Added the components mentioned above with the following abilities:

TextBox: A component representing an input field for entering/editing string values

Parameter	Type	Description
StartContent	RenderFragment?	Gets or sets content to be rendered at the start of the textbox.
EndContent	RenderFragment?	Gets or sets content to be rendered at the end of the textbox.
Label	string?	Gets or sets the label for the textbox.
Placeholder	string?	Gets or sets the placeholder for the textbox.
Description	string?	Gets or sets the description for the textbox.
ErrorMessage	string?	Gets or sets the error message for the textbox. This message is displayed only when the textbox is invalid.
Type	InputType	Gets or sets the input type of the textbox. The default value is `InputType.Text`
Variant	InputVariant	Gets or sets the variant for the textbox. The default value is `InputVariant.Flat`
Behavior	InputBehavior	Gets or sets the input behavior, specifying when the textbox updates its value and triggers validation. The default value is `InputBehavior.OnChange`
Radius	Radius?	Gets or sets the border radius of the textbox.
LabelPlacement	LabelPlacement	Gets or sets the placement of the label for the textbox. The default value is `LabelPlacement.Inside`
FullWidth	bool	Gets or sets a value indicating whether the textbox is full-width.
Clearable	bool	Gets or sets a value indicating whether the textbox should have a clear button.
OnCleared	EventCallback	Gets or sets a callback that is fired when the value in the textbox is cleared.
Classes	TextBoxSlots?	Gets or sets the CSS class names for the textbox slots.

DebounceInputBase: A base class for input components with debounced value updates

Parameter	Type	Description
DebounceDelay	int	Gets or sets the delay, in milliseconds, for debouncing input events.

Introduced new enum types to configure textbox's behavior:

InputBehavior: Specifies when the input component updates its value and triggers validation.

Options	Description
OnInput	Updates the value and triggers validation on each input event (e.g., when the user types in the input field).
OnChange	Updates the value and triggers validation on change events (e.g., when the input field loses focus or the user presses enter).

InputVariant: Specifies the different variants for an input component.

Options	Description
Flat	A flat variant input.
Outlined	An outlined variant input.
Underlined	An underlined variant input.

InputType: Specifies the different types of input elements.

Options	Description
Text	A text input field.
Password	A password input field.
Email	An email input field.
Hidden	A hidden input field.
Number	A number input field.
Search	A search input field.
Telephone	A telephone input field.
Url	A URL input field.
Color	A color input field.
Date	A date input field.
DateTimeLocal	A date-time input field (local time).
Month	A month input field.
Time	A time input field.
Week	A week input field.

LabelPlacement: Specifies the placement options for the label of an input component.

Options	Description
Inside	Places the label inside the input component.
Outside	Places the label outside the input component.

Checklist

[x] My code follows the project's coding style and guidelines.
[x] I have included inline docs for my changes, where applicable.
[x] I have added, updated or removed tests according to my changes.
[x] All tests are passing.
[x] There's an open issue for the PR that I am making.

Files	Patch %	Lines
...umexUI/Components/Bases/LumexDebouncedInputBase.cs	94.12%	0 Missing and 2 partials :warning:
src/LumexUI/Components/Bases/LumexInputBase.cs	85.71%	1 Missing and 1 partial :warning:

LumexUI / lumexui