Please consider easier to type default keybindings for cargo actions

The default keybindings for running cargo actions are

• C-c C-c C-u rust-compile
• C-c C-c C-k rust-check
• C-c C-c C-r rust-run
• C-c C-c C-t rust-test
• C-c C-c C-l rust-run-clippy

When touch-typing, these are quite difficult to type, requiring first using one Ctrl-key and then the other.

While it is common among Emacs modes to use C-c C-c for "finishing" or "building" something, I am not aware of a tradition of continuing with C-<letter> after the prefix. Nor seems there to be such a necessity, since any key binding after the C-c C-c prefix is still free.

How about redefining the above such that a simple letter chooses the action, for example:

• C-c C-c u rust-compile (although one may ask why "u" for compile/build)
• C-c C-c k rust-check
• C-c C-c r rust-run
• C-c C-c t rust-test
• C-c C-c l rust-run-clippy

I am aware that anyone may redefine keybindings, and this is what I did. I am signalling this here because I believe that a good default configuration is valuable.

Locate the default keybinding definitions for rust-compile, rust-check, rust-run, rust-test, and rust-run-clippy, then review how their C-c C-c bindings are declared. Update the defaults if appropriate and verify that each command is reachable through the proposed single-letter suffixes without conflicting bindings.