Add Key Mapper GUI Keyboard app

• The app complies with the inclusion criteria
• The original app author has been notified (and supports the inclusion)
• All related fdroiddata and RFP issues have been referenced in this merge request
• The upstream app source code repo contains the app metadata (summary/description/images/changelog/etc) in a Fastlane or Triple-T folder structure
• Builds with fdroid build
• Releases are tagged

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It fails to build with fdroid build but it does work in Android Studio. Here is the log. io.github.sds100.keymapper.inputmethod.latin.log

It throws errors for all the dictionaries in \dictionaries. ERROR: Found gzip file archive at dictionaries/lv_wordlist.combined.gz.