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/data/TextureDB.cpp

@@ -1,5 +1,6 @@
 #include "TextureDB.h"
 
+#include "common/log/log.h"
 #include "common/util/Assert.h"
 
 #include "third-party/fmt/core.h"
@@ -49,11 +50,11 @@ void TextureDB::replace_textures(const fs::path& path) {
   for (auto& tex : textures) {
     fs::path full_path = base_path / tpage_names.at(tex.second.page) / (tex.second.name + ".png");
     if (fs::exists(full_path)) {
-      fmt::print("Replacing {}\n", full_path.string().c_str());
+      lg::info("Replacing {}", full_path.string().c_str());
       int w, h;
       auto data = stbi_load(full_path.string().c_str(), &w, &h, 0, 4);  // rgba channels
       if (!data) {
-        fmt::print("failed to load PNG file: {}\n", full_path.string().c_str());
+        lg::warn("failed to load PNG file: {}", full_path.string().c_str());
         continue;
       }
       tex.second.rgba_bytes.resize(w * h);