logs: replace every fmt::print with a lg call instead (#1368)

Favors the `lg` namespace over `fmt` directly, as this will output the
logs to a file / has log levels.

I also made assertion errors go to a file, this unfortunately means
importing `lg` and hence `fmt` which was attempted to be avoided before.
But I'm not sure how else to do this aspect without re-inventing the
file logging.

We have a lot of commented out prints as well that we should probably
cleanup at some point / switch them to trace level and default to `info`
level.

I noticed the pattern of disabling debug logs behind some boolean,
something to consider cleaning up in the future -- if our logs were more
structured (knowing where they are coming from) then a lot this
boilerplate could be eliminated.

Closes #1358

decompiler/analysis/expression_build.cpp

@@ -1,5 +1,6 @@
 #include "expression_build.h"
 #include "common/goos/PrettyPrinter.h"
+#include "common/log/log.h"
 #include "decompiler/Function/Function.h"
 #include "decompiler/IR2/Form.h"
 #include "decompiler/IR2/FormStack.h"
@@ -46,7 +47,7 @@ bool convert_to_expressions(
       info.second.name_override = rename->second;
     }
     //     debug
-    // fmt::print("STACK {} : {} ({})\n", info.first, info.second.typespec.print(),
+    // lg::print("STACK {} : {} ({})\n", info.first, info.second.typespec.print(),
     //         info.second.tp_type.print());
   }