common: Rewrite logging based on cut down citra logger (#86)

* common: Rewrite logging based on cut down Citra logger

* code: Misc fixes

* core: Bring back tls handler

* linker: Cleanup

* config: Remove log level

* logging: Enable console output by default

* core: Fix windows build

src/common/logging/text_formatter.h

@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: Copyright 2014 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <string>
+
+namespace Common::Log {
+
+struct Entry;
+
+/// Formats a log entry into the provided text buffer.
+std::string FormatLogMessage(const Entry& entry);
+
+/// Formats and prints a log entry to stderr.
+void PrintMessage(const Entry& entry);
+
+/// Prints the same message as `PrintMessage`, but colored according to the severity level.
+void PrintColoredMessage(const Entry& entry);
+
+} // namespace Common::Log