Merge pull request 'Feat(upload-release-asset): add composite action to upload release assets' (#2) from feature/action-to-upload-release-assets into main

Reviewed-on: #2

upload-release-asset/README.md

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+# upload-release-asset
+
+The `upload-release-asset` action uploads a given file as an asset to a release.
+
+## Inputs
+
+### `file`
+
+The file that shall be uploaded.
+
+**Required:** yes
+
+### `name`
+
+The name of the release asset. If no name is specified, the file name is used.
+
+**Required:** false
+
+### `release`
+
+The ID of the release the asset shall be uploaded to.
+
+**Required:** true

upload-release-asset/action.yml

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+# Copyright 2026 jCloud
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Upload release asset
+description: Uploads a file to a Gitea release
+
+inputs:
+  file:
+    description: File to upload
+    required: true
+  name:
+    description: Release asset name
+    required: false
+  release:
+    description: The ID of the release to upload the asset to
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Upload release asset
+      shell: bash
+      env:
+        GITEA_TOKEN: ${{ env.GITEA_TOKEN }}
+        FILE: ${{ inputs.file }}
+        NAME: ${{ inputs.name }}
+        RELEASE: ${{ inputs.release }}
+      run: |
+        if [ -z "$NAME" ]; then
+          NAME="$(basename "$FILE")"
+        fi
+
+        curl --fail \
+          -X POST \
+          -H "Authorization: token $GITEA_TOKEN" \
+          -H "Content-Type: application/octet-stream" \
+          --data-binary "@$FILE" \
+          "${{ gitea.api_url }}/repos/${{ gitea.repository }}/releases/$RELEASE/assets?name=$NAME"