Add functionality behind --dic argument in CU CLI

[LupusE]

As someone wanted to use the --dict in CLI and got an error, the source shows the functions load_key_file and load_dict_file are not defined. After some tests, I believe the functionality does not need to be an own function, it is easier to read and understand in one block while parsing the keys.

The if ... elif ... else construct is not very elegant, but works better for the different types of comparing as a match ... case. It is good to extend, if a .dic file (or single keys from a file) needs to be converted.

[github-actions[bot]]

You are welcome to add an entry to the CHANGELOG.md as well

[github-actions[bot]]

Built artifacts for commit 251c13d998f9cce046ffdd6eda4c00b3aed0d799

Firmware

• Ultra APP DFU Package
• Ultra binaries
• Lite APP DFU Package
• Lite binaries

Client

• Linux
• macOS
• Windows