More shell support?

[PeterDaveHello]

Not sure if we'll support these shells, just list them down.

• tcsh
• dash
• sash (Stand-alone shell)
• wish
• Thompson shell

[moormaster]

• tcsh
  -> feat: add tcsh support #17
• dash

🚫 sash (Stand-alone shell)

• unable to declare functions - only aliases possible
• unable to echo escaped characters from alias

  > echo -e "\033[31mHello world\033[m"
  Hello world
  > # works and is colored when entered manually, but ...
  
  > alias echo.Red echo -e "\033[31mHello world\033[m"
  > echo.Red
  033[31mHello world033[m
  > # ... does not :(
  

• unable to insert arguments "within" alias commands

  > alias echo.Std echo "-$(*)-"
  > echo.Std Hello world
  -- Hello world
  > # arguments have been appended - not inserted :(
  

• wish

🚫 Thompson shell

• no functions possible?
• no aliases possible?
  -> https://etsh.dev/man/_tsh.1.html