Represent `Integer` tokens as `Text` instead of `Integer`

[Mesabloo]

Everything is explained here: https://github.com/nihil-lang/nsc/blob/087922f9aafd2c0fd3f0416d14d4247edc3038dd/lib/nsc-parser/src/Language/NStar/Syntax/Lexer.hs#L140-L152

This breaks the parser sometimes, producing error messages like

[error]: Parse error on input
     In: test/error_unknownRegister.nst

 1| mov %0123, %rax
         ^ unrecognized register '123'

Registers are fixed depending on the target architecture.
Registers available in different architectures are documented here:
<https://github.com/nihil-lang/nsc/blob/develop/docs/registers.md>.

The error message should instead report the unrecognized register being 0123.
While this isn't much of an issue, it is better to have consistency in early stages.

[Mesabloo]

Issue has been fixed in 7007a27.
The test test/error_movToInteger.nst now reports

 [error]: Parse error on input
      In: test/error_movToInteger.nst

  9| mov %0123, %rax
          ^ unrecognized register '0123'

 Registers are fixed depending on the target architecture.
 Registers available in different architectures are documented here:
 <https://github.com/nihil-lang/nsc/blob/develop/docs/registers.md>.

which is the expected error. 🎉