fix: Various achievements issues (Edit the Hex, ROM Hacks) (#1985)

### 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.

---------

Signed-off-by: BioTheWolff <47079795+BioTheWolff@users.noreply.github.com>

lib/libimhex/include/hex/api/event_manager.hpp

@@ -11,6 +11,7 @@
 
 #include <hex/api/imhex_api.hpp>
 #include <hex/helpers/logger.hpp>
+#include <hex/helpers/patches.hpp>
 
 #include <wolv/types/type_name.hpp>
 
@@ -253,7 +254,12 @@ namespace hex {
     EVENT_DEF(EventWindowInitialized);
     EVENT_DEF(EventWindowDeinitializing, GLFWwindow *);
     EVENT_DEF(EventBookmarkCreated, ImHexApi::Bookmarks::Entry&);
-    EVENT_DEF(EventPatchCreated, u64, u8, u8);
+
+    /**
+     * @brief Called upon creation of an IPS patch.
+     * As for now, the event only serves a purpose for the achievement unlock.
+     */
+    EVENT_DEF(EventPatchCreated, const u8*, u64, const PatchKind);
     EVENT_DEF(EventPatternEvaluating);
     EVENT_DEF(EventPatternExecuted, const std::string&);
     EVENT_DEF(EventPatternEditorChanged, const std::string&);

lib/libimhex/include/hex/helpers/patches.hpp

@@ -21,6 +21,11 @@ namespace hex {
         MissingEOF
     };
 
+    enum class PatchKind {
+        IPS,
+        IPS32
+    };
+
     class Patches {
     public:
         Patches() = default;