Minor Grammar Changes and Sentence Reworking in README.md

[jakemcf22]

• are versioned independently and they have their -> are versioned independently and have their
• All extensions dependent on external libraries will be disabled, if these libraries could not be found -> If external libraries for extensions cannot be found, they will be disabled
• For example following command -> For example, the following command
• subdirectory in extensions directory -> subdirectory in the extensions directory
• directory and rebuild whole project -> directory and rebuild the whole project

[michpolicht]

Thank you for your contribution to CuteHMI, but GitHub repo is only a mirror. Could you please create a KDE identity as described here (or maybe you have one) and then create a merge request at https://invent.kde.org/sdk/cutehmi?

[michpolicht]

Sorry, although it was merged I couldn't push it to the KDE repo, because server hooks don't allow commits without providing first name, last name and email address domain users.noreply.github.com is blocked. Please fix that if you want your commit to be merged.