[consteig] Add consteig 1.0.0

[MitchellThompkins]

• Changes comply with the maintainer guide.
• The packaged project shows strong association with the chosen port name. Check this box if at least one of the following criteria is met:
  • The project is in Repology: https://repology.org//versions
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  • The port name follows the 'GitHubOrg-GitHubRepo' form or equivalent Owner-Project form.
• Optional dependencies of the build are all controlled by the port. A dependency is controlled if it is declared an unconditional dependency in vcpkg.json, or explicitly disabled through patches or build system arguments such as CMAKE_DISABLE_FIND_PACKAGE_Xxx or VCPKG_LOCK_FIND_PACKAGE
• The versioning scheme in vcpkg.json matches what upstream says.
• The license declaration in vcpkg.json matches what upstream says.
• The installed as the "copyright" file matches what upstream says.
• The source code of the component installed comes from an authoritative source.
• The generated "usage text" is brief and accurate. See adding-usage for context. Don't add a usage file if the automatically generated usage is correct.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.

[MitchellThompkins]

@microsoft-github-policy-service agree

[vicroms]

Some minor nits.

[vicroms]

Suggested change

	REF "1.0.0"
	REF "{VERSION}"

If this matches the version in vcpkg.json, we can make this change to simplify changes in the future.

[MitchellThompkins]

Should be addressed by d1cde47

[vicroms]

Suggested change

	-DCONSTEIG_VERSION=1.0.0
	-DCONSTEIG_VERSION="${VERSION}"

Ensures that the version doesn't get desynchronized if someone forgets to update this line.

[MitchellThompkins]

Should be addressed by d1cde47

[vicroms]

Suggested change

	vcpkg_cmake_config_fixup(PACKAGE_NAME consteig CONFIG_PATH lib/cmake/consteig)
	vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/consteig)

PACKAGE_NAME is not necessary in this case.

[MitchellThompkins]

Should be addressed by d1cde47

[vicroms]

Suggested change

	vcpkg_from_github(
	set(VCPKG_BUILD_TYPE release) # header-only library
	vcpkg_from_github(

[MitchellThompkins]

Should be addressed by d1cde47