This reduces bootstrap cost for Windows customers, resolving the issue initially submitted as #12502 .

The `toolsrc` tree was extracted to https://github.com/microsoft/vcpkg-tool. `bootstrap.sh` was changed to download the right source tarball, extract, and build it. This was chosen over the previous attempt, a submodule, over concerns of accidentally destroying people's local modifications.

* [vcpkg wip] start implementation of registries pt. 2

* Remove the `ports` field of `VcpkgPaths`

This is an implementation detail, and so we want to make sure that
it's obvious that this is an internal detail; thus, we add a new function
`builtin_ports_directory()`,
which returns the directory where the builtin ports backing store is.

* continue WIP

* wip

* It works!

* format

* fix some issues

* switch from function static to DelayedInit
* fix lexically_normal for experimental::filesystem

* format

* fix missing include

* add STL notice

* whee error handling

* moar error handling!

* ignore extra files in registries

* formatting

* Billy CRs

* Update toolsrc/include/vcpkg/versiont.h

* fix add_filename test

* fix tests

* remove unused function add_filename

* Fix the case of current_path() before use on Windows.

This is a better solution than that I tried in https://github.com/microsoft/vcpkg/pull/13144 -- rather than trying to cannoicalize the path completely, which would destroy symlinks etc; this form  calls FindFirstFile on each path element to get the real case from the filesystem.

Fixes #13105.

(Note the wrong case in the CWD in the prompt, but the correct case in all the output:)

PS C:\DeV\vcPKG> .\vcpkg.exe install curl
Computing installation plan...
The following packages will be built and installed:
    curl[core,non-http,schannel,ssl,sspi,winssl]:x86-windows
  * zlib[core]:x86-windows
Additional packages (*) will be modified to complete this operation.
Detecting compiler hash for triplet x86-windows...
Starting package 1/2: zlib:x86-windows
Building package zlib[core]:x86-windows...
Using cached binary package: C:\Users\billy\AppData\Local\vcpkg/archives\c6\c61dd1bcc23348934c55f4ced77f1e4b0f353394.zipBuilding package zlib[core]:x86-windows... done
Installing package zlib[core]:x86-windows...
Installing package zlib[core]:x86-windows... done
Elapsed time for package zlib:x86-windows: 62.26 ms
Starting package 2/2: curl:x86-windows
Building package curl[core,non-http,schannel,ssl,sspi,winssl]:x86-windows...
Could not locate cached archive: C:\Users\billy\AppData\Local\vcpkg/archives\9f\9fa16d473c9539e9ea7ab3922eff46618f3a4c4b.zip
-- Downloading https://github.com/curl/curl/archive/9d954e49bce3706a9a2efb119ecd05767f0f2a9e.tar.gz...
-- Extracting source C:/Dev/vcpkg/downloads/curl-curl-9d954e49bce3706a9a2efb119ecd05767f0f2a9e.tar.gz
-- Applying patch 0002_fix_uwp.patch
-- Applying patch 0004_nghttp2_staticlib.patch
-- Applying patch 0005_remove_imp_suffix.patch
-- Applying patch 0006_fix_tool_depends.patch
-- Applying patch 0007_disable_tool_export_curl_target.patch
-- Applying patch 0009_fix_openssl_config.patch
-- Applying patch 0010_fix_othertests_cmake.patch
-- Applying patch 0011_fix_static_build.patch
-- Using source at C:/Dev/vcpkg/buildtrees/curl/src/767f0f2a9e-91d24adee1.clean
-- Configuring x86-windows
-- Building x86-windows-dbg
-- Building x86-windows-rel
-- Installing: C:/Dev/vcpkg/packages/curl_x86-windows/share/curl/curl-config
-- Installing: C:/Dev/vcpkg/packages/curl_x86-windows/share/curl/vcpkg-cmake-wrapper.cmake
-- Installing: C:/Dev/vcpkg/packages/curl_x86-windows/share/curl/copyright
-- Performing post-build validation
-- Performing post-build validation done
Stored binary cache: C:\Users\billy\AppData\Local\vcpkg/archives\9f\9fa16d473c9539e9ea7ab3922eff46618f3a4c4b.zip
Building package curl[core,non-http,schannel,ssl,sspi,winssl]:x86-windows... done
Installing package curl[core,non-http,schannel,ssl,sspi,winssl]:x86-windows...
Installing package curl[core,non-http,schannel,ssl,sspi,winssl]:x86-windows... done
Elapsed time for package curl:x86-windows: 1.299 min

Total elapsed time: 1.33 min

The package curl:x86-windows provides CMake targets:

    find_package(CURL CONFIG REQUIRED)
    target_link_libraries(main PRIVATE CURL::libcurl)

PS C:\DeV\vcPKG>

* Fix *nix builds.

* PR feedback.

* Update toolsrc/src/vcpkg/base/files.cpp

Co-authored-by: ras0219 <533828+ras0219@users.noreply.github.com>

Co-authored-by: Nicole Mazzuca <mazzucan@outlook.com>
Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>

* [vcpkg formatting] correct the header regexes

* format

* [vcpkg] Format the C++ in the CI

* format the C++

* CR

The old check checked to see if the computer was in developer mode _OR_ allowed sideloading apps, but we want _only_ developer mode.

- Add the "VCPKG_DEVELOPMENT_WARNINGS" flag
	- setting "WERROR" will also set this flag
	- This flag is set by default
	- on GCC/clang, this will pass '-Wall -Wextra -Wpedantic -Werror'
	- on GCC, this will additionally pass '-Wmissing-declarations'
	- on clang, this will additionally pass '-Wmissing-prototypes'
	- on MSVC, this will pass '-W4 -WX'
- On Visual Studio 2017 and later, pass '-permissive-'
- Change the source for fallout of these changes
- add `format` subcommand
	- formats all C++ source and header files using clang-format
- move `include/vcpkg-test/catch.h` to `include/catch2/catch.hpp`
- pass CONFIGURE_DEPENDS to file(GLOB)