Massive refactor to accommodate RISC-V targets

- Refactored entire codebase (excluding the Insight component) to accommodate multiple target architectures (no longer specific to AVR)
- Deleted 'generate SVD' GDB monitor command - I will eventually move this functionality to the Bloom website
- Added unit size property to address spaces
- Many other changes which I couldn't be bothered to describe here

src/Targets/TargetDescription/Register.hpp

@@ -60,9 +60,9 @@ namespace Targets::TargetDescription
         const BitField& getBitField(std::string_view key) const {
             const auto bitField = this->tryGetBitField(key);
             if (!bitField.has_value()) {
-                throw Exceptions::InvalidTargetDescriptionDataException(
-                    "Failed to get bit field \"" + std::string(key) + "\" from register in TDF - bit field not found"
-                );
+                throw Exceptions::InvalidTargetDescriptionDataException{
+                    "Failed to get bit field \"" + std::string{key} + "\" from register in TDF - bit field not found"
+                };
             }
 
             return bitField->get();