chore: convert dep5 tto reuse.toml

Solve:

```
/opt/venv/lib/python3.11/site-packages/reuse/project.py:332: PendingDeprecationWarning: '.reuse/dep5' is deprecated. You are recommended to instead use REUSE.toml. Use `reuse convert-dep5` to convert.
```

Signed-off-by: Vitor Mattos <[email protected]>

REUSE.toml

@@ -0,0 +1,63 @@
+# SPDX-FileCopyrightText: 2024 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+version = 3.0
+[project]
+name = "libresign"
+homepage = "https://github.com/LibreSign/libresign"
+contact = "LibreCode <[email protected]>"
+
+default-license = "AGPL-3.0-or-later"
+default-copyright = "2020-2024 LibreCode coop and contributors"
+
+[[files]]
+pattern = ".github/CODEOWNERS"
+license = "CC0-1.0"
+copyright = "none"
+
+[[files]]
+pattern = [
+    ".devcontainer/devcontainer.json",
+    "appinfo/info.xml",
+    "composer.json",
+    "composer.lock",
+    ".github/ISSUE_TEMPLATE/2_feature_request.md",
+    ".github/ISSUE_TEMPLATE/feature_request.md",
+    ".github/pull_request_template.md",
+    ".prettierrc",
+    ".tx/config",
+    "img/*.png",
+    "img/*.svg",
+    "img/screenshot/*",
+    "jsconfig.json",
+    "l10n/*.js",
+    "l10n/*.json",
+    "Makefile",
+    "openapi-administration.json",
+    "openapi-full.json",
+    "openapi.json",
+    "package-lock.json",
+    "package.json",
+    "phpunit.xml",
+    "psalm.xml",
+    "src/types/openapi/openapi-administration.ts",
+    "src/types/openapi/openapi-full.ts",
+    "src/types/openapi/openapi.ts",
+    "tests/Unit/Handler/mock/cert.json",
+    "tests/fixtures/cfssl/newcert-with-success.json",
+    "tests/fixtures/small_valid-signed.pdf",
+    "tests/fixtures/small_valid.pdf",
+    "tests/integration/composer.json",
+    "tests/integration/composer.lock",
+    "tests/integration/features/*/*.feature",
+    "tests/psalm-baseline.xml",
+    "tsconfig.json",
+    "vendor-bin/*/composer.json",
+    "vendor-bin/*/composer.lock"
+]
+license = "AGPL-3.0-or-later"
+copyright = "2020-2024 LibreCode coop and contributors"
+
+[[files]]
+pattern = "src/assets/fonts/DancingScript/DancingScript.ttf"
+license = "OFL-1.1"
+copyright = "2012-2024 Google LLC"