Update gradle-build-action to v2.4.2

Make gradlew wrapper executable

Run regression tests in CI

Add basic support for old AMXB AMXX binaries

Add basic AMXMod support

Upgrade to Gradle 7.3.1

Add basic parsing for new heap and directarrays opcodes

Try to avoid referencing from the middle of a string

Fix another typo in string detection logic

Fix typo in SP string detection heuristic

Fix handling of invalid argument access

Load .amxx files without debug info #27

Fix printing dummy variables for by-ref parameters

Improve array move decompilation

Fix heuristic for global string initializers in amxx