These set the horizontal scale factor, character spacing, word
spacing, and text rise respectively.
Also add a global scale transform, and set a text transform matrix
with a scale for some of the text.
Mostly because I audited all places that assigned to `m_text_matrix`
after #22760.
This one is very difficult to trigger in practice.
`show_text()` marks the text rendering matrix dirty already,
so this only has an effect if the `TJ` array starts with a
number, and the matrix isn't marked dirty going in.
`Tm` caches the text rendering matrix, so I changed text.pdf
to contain:
```
1 0 0 1 45 130 Tm
[ 200 (Hello) -2000 (World) ] TJ T*
```
This first sets an x offset of 5 (on top of the normal 40), and
then undoes it (`200` is multiplied by font size (25) / -1000,
and `200 * 25 / -1000` is -5). Before this change, the topmost
"Hello World" ended up slightly indented.
Likely no behavior change in practice, but makes the code easier
to understand, and maybe it helps in the wild somewhere.
Hand-written, based on the text example in Appendix G.2 in
the PDF 1.7 spec, with the xref table fixed up by `mutool clean`:
mutool clean -dggg Tests/LibPDF/text.pdf Tests/LibPDF/text.pdf
