gl_shader_decompiler: Check if SetRegister result is ZeroIndex.

* Regression and Mode Fixes

* Review Fixes

* string_view correction

* Add operator& for FileSys::Mode

* Return std::string from SanitizePath

* Farming Simulator Fix

* Use != With mode operator&

gl_shader_decompiler: Implement shader instruction TLDS.

exclusive_monitor: Use consistent type alias for u64

loader: Minor cleanup

linker: Remove unused parameter from WriteRelocations()

loader/nro: Minor changes

gl_shader_decompiler: Simplify GetCommonDeclarations()

vi: Minor changes

hle: Remove unused config_mem and shared_page source files

Uses the same type aliases we use for virtual addresses, and converts
one lingering usage of std::array<uint64_t, 2> to u128 for consistency.

RealVfsFile inherits from VfsFile, the instance from std::make_shared is
already compatible with the function argument type, making the copy
constructor call unnecessary.

is_jump_relocation is never used within the function, so we can just
remove it.

It's sufficient to use a forward declaration instead of a direct
inclusion here.

Makes the code more uniform, and also braces cases where the body of an
unbraced conditional travels more than one line.

Makes it consistent with the other Apploader constructors, and prevents
implicit conversions.

This isn't used anywhere in the header.

NRO Assets and NACP File Format

set: Add missing log call in GetAvailableLanguageCodeCount()

It's undefined behavior to memcpy an object that isn't considered
trivially copyable, so put a compile-time check in to make sure this
doesn't occur.

Allows avoiding unnecessary copies of the vector depending on the
calling code.

While we're at it, remove a redundant no-parameter base constructor call

This is just an unused hold-over from citra, so we can get rid of this
to trim off an exposed global, among other things.

This is a holdover from citra that's essentially unused.

Forgot to include this in 22f448b6

string_util: Minor changes

Cleanup

Review fixes

set: Amend return value of GetAvailableLanguageCodes()

This just returns the size of the language code buffer.

The return code should be 32-bit in size.

shader_bytecode: Implement other TEXS masks.

string_util: Get rid of separate resize() in CPToUTF16(), UTF16ToUTF8(), CodeToUTF8() and UTF8ToUTF16()

There's no need to perform the resize separately here, since the
constructor allows presizing the buffer.

Also move the empty string check before the construction of the string
to make the early out more straightforward.

This is equivalent to doing:

push_back(std::string(""));

which is likely not to cause issues, assuming a decent std::string
implementation with small-string optimizations implemented in its
design, however it's still a little unnecessary to copy that buffer
regardless. Instead, we can use emplace_back() to directly construct the
empty string within the std::vector instance, eliminating any possible
overhead from the copy.

We can just use the variant of std::string's replace() function that can
replace an occurrence with N copies of the same character, eliminating
the need to allocate a std::string containing a buffer of spaces.

Kernel/SVC: Perform atomic accesses in SignalProcessWideKey as per the real kernel.

Frontend: Check for more required OpenGL extensions during startup.

 file_util, vfs: Use std::string_view where applicable