feat(components): add popover component

[desmondinho]

Closes #55

What's been done?

Added popover-related components with the following abilities:

Popover: A component representing a popover, providing a floating container that displays additional content or information.

Parameter	Type	Description
ChildContent	RenderFragment?	Gets or sets content to be rendered inside the popover.
Color	ThemeColor	Gets or sets a color of the popover.
Size	Size	Gets or sets a size of the popover content text.
Radius	Radius	Gets or sets a border radius of the popover.
Shadow	Shadow	Gets or sets a shadow of the popover.
Placement	PopoverPlacement	Gets or sets a placement of the popover relative to a reference.
Offset	int	Gets or sets the offset distance between the popover and the reference, in pixels.
ShowArrow	bool	Gets or sets a value indicating whether the popover should display an arrow pointing to the reference.
Classes	TextBoxSlots?	Gets or sets the CSS class names for the textbox slots.

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PopoverTrigger: A component representing the trigger element for a Popover, which controls the display of the popover.

Parameter	Type	Description
ChildContent	RenderFragment?	Gets or sets content to be rendered inside the popover trigger.
Color	ThemeColor	Gets or sets a color of the popove trigger.

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PopoverContent: A component representing the content of a Popover, which is displayed within the popover.

Parameter	Type	Description
ChildContent	RenderFragment?	Gets or sets content to be rendered as the popover content.

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Popover slots: A class representing the various slot configurations for the Popover

1. Root: the slot for the Popover, it wraps the popover content and arrow.
2. Trigger: the slot for the PopoverTrigger.
3. Content: the slot for the PopoverContent, it contains the popover content.
4. Arrow: the slot for the arrow.

Checklist

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

[desmondinho]

An essential component for the #50