[Docs]Clarify alignment of suggestion in docs

[udcode]

Is your feature request related to a problem? Please describe.
need to align RTL texts from right to left currently the suggestion is sticked to the left side

Describe the solution you'd like
Add Alignment argument to the searchfield widget

Describe alternatives you've considered

Additional context
Ill add a PR for the solution

[maheshmnj]

Hello @udcode, thanks for filing the issue. This is already possible as of today by passing a child property to
SearchFieldListItem e.g see this answer #40 (comment)

 SearchField(
      suggestions: _statesOfIndia
      .map((e) => SearchFieldListItem(e,
          child: Align(
              alignment: Alignment.centerRight,
              child: Text(e,
                  style: TextStyle(color: Colors.red),
              ),
          )
        ).toList(),
...
)

there have been similar issue reports in the past

#66
#40

[maheshmnj]

So I believe we should just clarify this in the readme/docs with an example and it should resolve.

[maheshmnj]

Fixed in Release v0.8.4
Thank you for your contribution!

cc: @udcode