Addon Manager: installing without opening a page of a selected add-on

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Problem description

Currently, to install or uninstall an add-on, one needs to click on it on the list to be taken to its page from where it can be installed/uninstalled. Those pages tend to take some time to load, especially with slower Internet connections. It would be nice to have an option to just select an add-on on the list and install it right away without having to open its full GitHub description. Maybe it could even work in such a way that multiple add-ons can be selected on the list at once and installed with a single click. Basically, the Install and Uninstall buttons should be available also from the main list of add-ons.


### Full version info

```shell
OS: Windows 10 build 19045
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.36874 (Git)
Build type: Release
Branch: main
Hash: a4dd600ec6d5a53a9960cd9f8693d7d307b9e359
Python 3.11.8, Qt 5.15.13, Coin 4.0.2, Vtk 9.2.6, OCC 7.7.2
Locale: Polish/Poland (pl_PL)
```

### Subproject(s) affected?

Addon Manager

### Anything else?

_No response_

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct