[ffi] Cleanup after move and bump to v2.1.2

[dcharkes]

• Update repository in pubspec.yaml to point to the new location.
• Bump version so we can release to pub so the readme there points to this repo.
• Add to toplevel readme
• Update badge urls
• Fix workflow name
• Add issue template

[github-actions]

PR Health

Breaking changes ✔️

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Package	Change	Current Version	New Version	Needed Version	Looking good?
ffi	None	2.1.1	2.1.2	2.1.1	✔️

Changelog Entry ✔️

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Package	Changed Files

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License Headers ✔️

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// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

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no missing headers

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pkgs/jni/lib/src/third_party/global_env_extensions.dart
pkgs/jni/lib/src/third_party/generated_bindings.dart
pkgs/jni/lib/src/third_party/jni_bindings_generated.dart
pkgs/jni/lib/src/lang/jcharacter.dart
pkgs/jnigen/android_test_runner/lib/main.dart
pkgs/jnigen/test/jackson_core_test/third_party/c_based/dart_bindings/com/fasterxml/jackson/core/_package.dart
pkgs/jnigen/test/jackson_core_test/third_party/dart_only/dart_bindings/com/fasterxml/jackson/core/_package.dart
pkgs/jnigen/example/kotlin_plugin/example/lib/main.dart
pkgs/jnigen/example/kotlin_plugin/lib/kotlin_bindings.dart
pkgs/jnigen/example/kotlin_plugin/lib/kotlin_plugin.dart
pkgs/jnigen/example/in_app_java/lib/android_utils.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/_init.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/PDDocumentInformation.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/PDDocument.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/pdmodel/_package.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/text/PDFTextStripper.dart
pkgs/jnigen/example/pdfbox_plugin/lib/src/third_party/org/apache/pdfbox/text/_package.dart
pkgs/jnigen/example/pdfbox_plugin/lib/pdfbox_plugin.dart
pkgs/jnigen/tool/command_runner.dart
pkgs/jnigen/lib/src/bindings/descriptor.dart
pkgs/jnigen/lib/src/elements/elements.g.dart
pkgs/ffi/example/main.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_varargs_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_comment_markup_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_dart_handle_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_regress_384_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_packed_structs_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_functions_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_forward_decl_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_typedef_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_native_func_typedef_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_opaque_dependencies_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_unions_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_struct_fptr_fields_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_imported_types_bindings.dart
pkgs/ffigen/test/native_test/_expected_native_test_bindings.dart
pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_type_name_collision_bindings.dart
pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_decl_collision_bindings.dart
pkgs/ffigen/test/collision_tests/expected_bindings/_expected_reserved_keyword_collision_bindings.dart
pkgs/ffigen/test/collision_tests/expected_bindings/_expected_decl_symbol_address_collision_bindings.dart
pkgs/ffigen/test/large_integration_tests/_expected_libclang_bindings.dart
pkgs/ffigen/test/large_integration_tests/_expected_cjson_bindings.dart
pkgs/ffigen/test/large_integration_tests/_expected_sqlite_bindings.dart
pkgs/ffigen/example/objective_c/avf_audio_bindings.dart
pkgs/ffigen/example/shared_bindings/generate.dart
pkgs/ffigen/example/shared_bindings/lib/generated/base_gen.dart
pkgs/ffigen/example/shared_bindings/lib/generated/a_gen.dart
pkgs/ffigen/example/shared_bindings/lib/generated/a_shared_b_gen.dart
pkgs/ffigen/example/swift/swift_api_bindings.dart
pkgs/ffigen/example/simple/generated_bindings.dart
pkgs/ffigen/example/libclang-example/generated_bindings.dart
pkgs/ffigen/lib/src/config_provider/config_spec.dart
pkgs/ffigen/lib/src/header_parser/clang_bindings/clang_bindings.dart
tools/check_pubspec_overrides.dart
tools/delete_pubspec_overrides.dart

Package publish validation ✔️

Details

Package	Version	Status
package:ffi	2.1.2	ready to publish
package:ffigen	12.0.0-wip	WIP (no publish necessary)
package:jni	0.8.0-wip	WIP (no publish necessary)
package:jnigen	0.8.0-wip	WIP (no publish necessary)
package:native_assets_builder	0.3.1-wip	WIP (no publish necessary)
package:native_assets_cli	0.4.1	already published at pub.dev
package:native_toolchain_c	0.3.5-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.

[dcharkes]

  * Packages with an SDK constraint on a pre-release of the Dart SDK should themselves be published as a pre-release version. If this package needs Dart version 3.3.0-279.1.beta, consider publishing the package as a pre-release instead.
    See https://dart.dev/tools/pub/publishing#publishing-prereleases For more information on pre-releases.
[...]
Notice: pub publish dry-run failed; add the `publish-ignore-warnings` label to ignore

We want to release with a beta constraint ahead of a stable release to prevent having to release this package on release day.

[dcharkes]

@mosuem It looks like the Publish workflow doesn't understand the publish-ignore-warnings label? (Health does.)