Version Detection

[LivacoNew]

Adds version detection to terminal, shell and editor. Detects through the following steps;

• First will search the package manager caches for the version, will only do this if the executable is in /usr/bin
• Otherwise, will compare the checksum of the executable with a list of known checksums. This is a last ditch attempt to not have to do the most potentially performance-damaging step which is;
• Run {executable} --version and parse it.

To-Do before I merge;

• Check for if {version} is present in the format before fetching the version information, as the operation is quite intensive.
• Cleanup a bit of code from my prototyping

Post-merge improvements would be;

• Moving package manager readouts to a separate method/struct that does it all in pre-detection. This is because currently for each version we need to fetch, it re-parses the entire file from the start which is really expensive for package managers such as DPKG, while also adding on the overhead from the package module.
• Adding RPM, not added yet as I wasn't able to locate where versions are stored in the raw package database

Completes #13