### Problem description
<!-- Describe the bug that you fixed/feature request that you
implemented, or link to an existing issue describing it -->
This PR implements the feature request #1781, that suggests adding a
button to export disassembled instructions into an ASM file.
### Implementation description
This adds a button to export the current disassembled instructions to an
ASM file. Said file is suffixed by an `.asm` extension if not specified
at file creation.
*Note: the file is written to for every `Disassembly` item in the
vector, as it was the easiest and most memory-conservative way of doing
it.*
The file creation task is implemented based on IPS patch exports, so it
fits the same pattern.
A `ToastError` is raised when the ASM export could not complete
successfully.
Translations have been implemented for both `en_US` and `de_DE` for the
two new keys:
- `hex.disassembler.view.disassembler.export`: file export button
- `hex.disassembler.view.disassembler.export.popup.error`: error popup
text
### Screenshots
The button is disabled when the disassembler is working, or when the
disassembly vector is empty.
Here is a complete breakdown of the visual changes:
### Additional things
As expected, the exporter writes every item's `mnemonic` and `operators`
to the file, producing an output like this:
`example.asm`
```asm
.byte 0x7f, 0x45, 0x4c, 0x46
andeq r0, r1, r2, lsl #2
andeq r0, r0, r0
andeq r0, r0, r0
eorseq r0, lr, r3
andeq r0, r0, r1
andeq r1, r0, r0, asr #32
andeq r0, r0, r0
andeq r0, r0, r0, asr #32
```
---------
Signed-off-by: BioTheWolff <47079795+BioTheWolff@users.noreply.github.com>
