Allow Abbreviated Target Names

[Soroosh129]

Some languages such as Python and TypeScript have commonly-used abbreviations such as Py and TS, which are a lot less verbose than the full names. We should perhaps allow for target declarations to use these abbreviations (e.g. target Py).

One approach would be to allow all targets to have abbreviations, or have target-specific abbreviations when appropriate. For the former, we can allow the languages' file extension to be used as the target declaration (e.g., rs for Rust), as well as the full name. I personally prefer the latter approach (i.e., only allow Py and TS for now).

There is also the issue of case sensitivity. Should both target Py and target py be supported? I think the target names should all be case-sensitive (I went back and forth on this a bit) since a target declaration such as target c seems to be incorrect.

For now, I propose the following as the list of recognized target lists:

• C
• Cpp
• Rust
• Python or Py
• TypeScript or TS

[cmnrd]

I am a bit afraid about ambiguity here. What if we have to targets with common abbreviations that are the same? Since this affects only a single line per file, I think it is not too bad to force the verbose name.