decomp: finish the remainder of untouched gameplay code (#893)

* decomp: finish `sidekick`

* decomp: got a lot of `target` done

* decompiler: Add support for non power of 2 offsets for inline arr access

* decomp: finish `target` mostly

* decomp: finish `water`

* decomp: finished `robotboss-weapon`

* decomp: finish `robotboss-misc`

* decomp: finish the majority of `robotboss`

* blocked: `racer` has an issue around entering a state

* blocked: `target-racer` done mostly, but NYI case in one function

* blocked: `racer-states` mostly finished, but bitfield issue

* blocked: `billy` on state decomping

* blocked: `bully` on state decomping

* waiting: `rolling-lightning-mole` waiting on navigate for 2 funcs

* blocked: `rolling-robber` finished but `s6-1` issue

* blocked: `ogreboss` uint64's for types cant label load em!

* blocked: `mother-spider` state decompilation

* half-done `target-flut`

* blocked: `target-flut` some sort of new bitfield state

* some improvements in `racer-states` with my new-found knowledge

* progress: started on `target-death`

* blocked: `target-death` handle casts

* decomp: finish `collide-reaction-racer`

* blocked: `target-handler` handler forced to return `none`

* decomp: 99% of `target2` finished

* decomp: finish `target2`

* gsrc: update

* update post merge

* address feedback

* scripts: add script to detect decomp issues

* fix wide-spread `collide-shape` method missing arg

* some small things i changed from master

* address feedback

* fix typeconsistency issue

test/test_reader.cpp

@@ -349,6 +349,6 @@ TEST(GoosReader, TextDb) {
                     .as_pair()
                     ->cdr.as_pair()
                     ->car;
-  std::string expected = "test/test_data/test_reader_file0.gc, line: 5\n(1 2 3 4)\n ^\n";
+  std::string expected = "test/test_data/test_reader_file0.gc:5\n(1 2 3 4)\n ^\n";
   EXPECT_EQ(expected, reader.db.get_info_for(result));
 }