### Problem description
As described in #1846:
- the `Edit the Hex` achievement doesn't unlock when it should
- the `ROM Hacks` achievement is not using event-driven architecture
(the functions call `unlockAchievement` themselves)
### Implementation description
Firstly, for the `Edit the Hex` achievement:
- replaced the old event listener on `EventPatchCreated` with a listener
on `EventProviderDataModified`, which picks up bytes changes
- ensured the provider data change comes from a File provider, else
unlocking the achievement wouldn't make sense
- *Note*: a discovered side effect is that the "Fill" function modifies
the provider byte per byte (with a for loop)
- there is no use in testing the size of the data change, as it is
always 1 byte
- the Fill function could probably be reworked to fill in whole regions
at a time?
About the `ROM Hacks` achievement:
- implemented the new, still unused `EventPatchCreated` event.
- signal signature is `const unsigned char *, u64, const IPSKind`:
buffer pointer, buffer size, and IPS kind (IPS/IPS32)
- make use of the `::post` and `::subscribe` methods on said event to
unlock the achievement
- **WARNING::behaviour change**: the event's `post` signal has been
moved in the success branch of the IPS generation condition, meaning
that achievement will only unlock if IPS patch export has worked. I felt
it would make more sense than unlocking an achievement on an error, if
there was any to raise.
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Signed-off-by: BioTheWolff <47079795+BioTheWolff@users.noreply.github.com>
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