[FEAT] Improve module formattion

[CarterLi]

Instead of the meaningless {6}{7}{8}, {user-name-colored}{at-symbol-colored}{host-name-colored} should be supported

[zaynOm]

I totally agree the numbers are confusing, how are we supposed to know what each one means

[CarterLi]

$ fastfetch -h title-format
--title-format:
Sets the format string for Title output.
To see how a format string is constructed, take a look at "fastfetch --help format".
The following values are passed:
        {1}: User name
        {2}: Host name
        {3}: Home directory
        {4}: Executable path of current process
        {5}: User's default shell
        {6}: User name (colored)
        {7}: @ symbol (colored)
        {8}: Host name (colored)
The default is something similar to "{6}{7}{8}".