Add .gitattributes

[zonuexe]

.gitattributes can excludes files that don't need to be distributed with Composer.

Files to be archived can be checked using git archive HEAD | tar -t

$ git archive main | tar -t
.github/
.github/dependabot.yml
.github/workflows/
.github/workflows/ci.yml
.gitignore
.php-cs-fixer.dist.php
CONTRIBUTE.md
Dockerfile
LICENSE.md
README.md
composer.json
composer.lock
composerw
phpunit.xml
psalm-baseline.xml
psalm.xml
rector-test/
rector-test/ExampleTest.php
rector.php
src/
src/ConsecutiveArguments.php
src/ConsecutiveArgumentsRectorRule.php
tests/
tests/ConsecutiveArgumentsTest.php
tests/Stub/
tests/Stub/MockableConsecutiveArgumentInterface.php

$ git archive add/gitattributes | tar -t
.gitattributes
.gitignore
CONTRIBUTE.md
LICENSE.md
README.md
composer.json
composer.lock
src/
src/ConsecutiveArguments.php
src/ConsecutiveArgumentsRectorRule.php

[michaelpetri]

mmhmm seems like laminas/laminas-ci-matrix-action can't access this files either. :/