Client command framework improvements
1. Introduced contextual commands.
2. Added ${explorer.current.file.parent.path} macro.
3. Cleaned up unused resources.
4. Refactored code in order to simplify it and made it more clear and understandable:
- simplified a way of providing new command types;
- command types api moved to ide-api to avoid unnecessary dependency on machine extension;
- command management extracted from EditCommandsPresenter to the separate facade - CommandManager. So EditCommandsPresenter now doesn't perform several http requests manipulating with commands but only one;
- refactored code related to the obsolete terminology CommandPropertyValueProvider -> Macro;
- macro can provide its description (it will be really useful for showing it in UI);
- macros processing separated from the command execution and extracted to the separate component MacroProcessor since it's used not only for the commands but in debug configurations for example.
Florent BENOIT