Aggiunge azioni opencode-prompt e install-opencode

opencode-prompt/action.yml

@@ -0,0 +1,64 @@
+name: OpenCode Prompt
+description: Esegue un prompt opencode sul codice del repository.
+
+inputs:
+  prompt:
+    description: Il prompt da passare a opencode.
+    required: true
+  api-key:
+    description: API key per il provider opencode.
+    required: true
+  api-provider:
+    description: Nome del provider (default: opencode-go).
+    required: false
+    default: "opencode-go"
+  model:
+    description: Modello AI (formato provider/model).
+    required: false
+    default: ""
+  agent:
+    description: Agente opencode da utilizzare.
+    required: false
+    default: ""
+  working-directory:
+    description: Directory di lavoro per opencode. Se vuoto, usa la radice del repo.
+    required: false
+    default: ""
+
+outputs:
+  result:
+    description: Output prodotto da opencode.
+    value: ${{ steps.esegui.outputs.result }}
+
+runs:
+  using: composite
+  steps:
+    - name: Configura autenticazione opencode
+      shell: bash
+      run: |
+        set -euo pipefail
+        mkdir -p ~/.local/share/opencode
+        jq -n \
+          --arg provider "${{ inputs.api-provider }}" \
+          --arg key "${{ inputs.api-key }}" \
+          '{($provider): {type: "api", key: $key}}' > ~/.local/share/opencode/auth.json
+        chmod 600 ~/.local/share/opencode/auth.json
+
+    - name: Esegui opencode
+      id: esegui
+      shell: bash
+      run: |
+        set -euo pipefail
+        WD="${{ inputs.working-directory }}"
+        [ -z "$WD" ] && WD="$GITHUB_WORKSPACE"
+        cd "$WD"
+        EXTRA_ARGS=()
+        [ -n "${{ inputs.model }}" ] && EXTRA_ARGS+=(--model "${{ inputs.model }}")
+        [ -n "${{ inputs.agent }}" ] && EXTRA_ARGS+=(--agent "${{ inputs.agent }}")
+        opencode run "${{ inputs.prompt }}" "${EXTRA_ARGS[@]}" --dangerously-skip-permissions 2>&1 | tee "$GITHUB_WORKSPACE/opencode-output.txt"
+        RESULT=$(cat "$GITHUB_WORKSPACE/opencode-output.txt")
+        {
+          echo "result<<EOF"
+          echo "$RESULT"
+          echo "EOF"
+        } >> "$GITHUB_OUTPUT"