feat(core): window API

[lucasfernog]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• New Binding Issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes. Issue #___
• No

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:

This PR extends the window manipulation API (currently we only have setTitle), now every option configurable on tauri.conf.json > tauri > windows can be changed at runtime (position, size, min size, max size, fullscreen, maximized state, minimized state, transparent, always on top, decorations, resizable flag, visibility flag, icon).

[parker-codes]

So exciting!

[nklayman]

On the example (and probably on any app with these params) the maxHeight will do nothing if you do not set maxWidth too (same for minHeight as well), and vice versa. Also, putting a debounce on the maxHeight/Width might be a good idea, because now the window will shrink super small as you type in the number since it will set a single-digit value first.