Change README to markdown format.

Add translation status overview.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

README

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-Katapult is an application which analyses text-based queries
-to launch items such as bookmarks, directories or programs.

README.md

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+
+Katapult - item launcher for TDE [Trinity]
+
+
+Katapult is an application which analyses text-based queries
+to launch items such as bookmarks, directories or programs.
+
+.
+
+Contributing
+--------------
+
+If you wish to contribute to katapult, you might do so:
+
+- TDE Gitea Workspace (TGW) collaboration tool.
+  https://mirror.git.trinitydesktop.org/gitea
+
+- TDE Weblate Translation Workspace (TWTW) collaboration tool.
+  https://mirror.git.trinitydesktop.org/weblate
+
+
+Translations status
+---------------------
+
+### messages
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/katapult/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/katapult/)
+
+### desktop files
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/katapult-katapultdesktop/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/katapult-katapultdesktop/)
+
+### catalogs
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/katapult-catalogs/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/katapult-catalogs/)
+
+### displays
+[![Translations status](https://mirror.git.trinitydesktop.org/weblate/widgets/applications/-/katapult-displays/multi-auto.svg
+"Engage in translating")](https://mirror.git.trinitydesktop.org/weblate/projects/applications/katapult-displays/)