Modernize MakeROM build system + bug fixes (#120)

* Move files around to new directory structure

* Rework libyaml into a stand-alone dep for makerom.

* Rework libpolarssl to be standalone dependency for makerom.

* Update includes.

* Delete makefile

* Add new makefile for makerom.

* Update MakeROM github actions script.

* Fix again.

* Update MakeROM's makefile

* Tweak makerom build script

* Tweak MakeROM build script.

* Fix typo

* Update MakeROM makefiles.

* Tweak CTRTool build script.

* Tweak build script

* Tweak CTRTool build script.

* Tweak CTRTool build script

* Add libmbedtls to makerom deps

* Partially migrate makerom to libmbedtls

* Break out libblz as an external dependency for makerom.

* Tweak makerom build script.

* Move dependencies to the top level.

* Put everything back.

* misc

* Update makerom documentation.

* Link to ctrtool/makerom readmes from the root readme.

* Update root readme again.

* Migrate makerom to modern mbedtls

* Bump makerom version to 0.18.1

* Change signing errors to be warnings when they fail.

* Add error verbosity to errors when generating CIA files.

* Fix bug in RSA code.

* misc.

* Remove polarssl now migration to mbedtls complete.

* Surface more makerom errors.

* [makerom] Tolerate CCI signing errors as a warning.

* Add missing return.

* Import initial data key_x (prod/dev included)

* [makerom] Fix initial data generation.

makerom/src/ctr_utils.h

@@ -0,0 +1,4 @@
+#pragma once
+
+u32 GetCtrBlockSize(u8 flag);
+u8 GetCtrBlockSizeFlag(u32 size);