feat(mat-select): add smart panel width based on trigger and largest option size

### Feature Description

Currently `panelWidth` can be one of three:
1. Trigger width
2. Largest option width
3. Custom provided width in numbers

What I am missing is - minimum width as trigger width and grow until max option size (if needed)

### Use Case

When having dynamic options texts sometimes they might be larger than trigger width and I want the largest option behavior.
Sometimes they are smaller than trigger width and I want the trigger width behavior to avoid really small select panels.
Which means I actually need: min panel width = trigger width with potential grow (not shrink!) to the largest option width.

Can be with a new `panelWidth` option or even `minPanelWidth` input (can have a complimenting `maxPanelWidth` too for completeness)

まず、mat-select の既存の panelWidth の処理と、issue で説明されている trigger-width および largest-option の動作を読みます。パネルを trigger 以上の幅に保ちつつ、最大の option まで拡張できる API または option を定義して実装し、その後、より幅の広い option とより幅の狭い option の両方で動作を確認します。

索引モデルが issue の本文から書いたものです。