chore(REUSE): Add gitkeep file

Signed-off-by: Julius Knorr <jus@bitgrid.net>

Author: juliusknorr

REUSE.toml

@@ -6,7 +6,7 @@ SPDX-PackageSupplier = "Nextcloud <info@nextcloud.com>"
 SPDX-PackageDownloadLocation = "https://github.com/nextcloud/richdocuments"
 
 [[annotations]]
-path = [".gitattributes", ".github/issue_template.md", ".github/CODEOWNERS", ".editorconfig", "package-lock.json", "package.json", "composer.json", "composer.lock", "**/composer.json", "**/composer.lock", ".l10nignore", "cypress/tsconfig.json", "vendor-bin/**/composer.json", "vendor-bin/**/composer.lock", ".tx/config", "tsconfig.json", "js/vendor.LICENSE.txt", "krankerl.toml", ".npmignore", ".nextcloudignore", ".eslintrc.json", ".tx/backport"]
+path = [".gitattributes", ".github/issue_template.md", ".github/CODEOWNERS", ".editorconfig", "package-lock.json", "package.json", "composer.json", "composer.lock", "**/composer.json", "**/composer.lock", ".l10nignore", "cypress/tsconfig.json", "vendor-bin/**/composer.json", "vendor-bin/**/composer.lock", ".tx/config", "tsconfig.json", "js/vendor.LICENSE.txt", "krankerl.toml", ".npmignore", ".nextcloudignore", ".eslintrc.json", ".tx/backport", "assets/fonts/.gitkeep"]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "none"
 SPDX-License-Identifier = "CC0-1.0"