Support adding suggestions #35
Description
Gitlab's suggestion let you as a CRer suggest the fix on the given code in the merge request.,
This is done using a message from a specific format. It should be added to the plugin.
This should not be too hard since all that should be done is to construct the message as it is needed by GitLab.
The plugin should support a command that will get a range, and create a buffer with suggestion about this range of lines. The default value of the lines should be the current strings in them (so the user will only need to change the wanted information in it, without copying the rest of the data).