[API] Forgejo API /api/forgejo/v1

(cherry picked from commit 20b5669269)
(cherry picked from commit 1574643a6a)

Update semantic version according to specification

(cherry picked from commit 22510f4130)

Mise à jour de 'Makefile'

(cherry picked from commit c3d85d8409)
(cherry picked from commit 5ea2309851)
(cherry picked from commit ec5217b9d1)
(cherry picked from commit 14f08e364b)

public/forgejo/api.v1.yml

@@ -0,0 +1,40 @@
+openapi: 3.0.0
+info:
+  title: Forgejo API
+  description: |-
+    Forgejo REST API
+
+  contact:
+    email: contact@forgejo.org
+  license:
+    name: MIT
+    url: https://codeberg.org/forgejo/forgejo/src/branch/forgejo/LICENSE
+  version: 1.0.0
+externalDocs:
+  description: Find out more about Forgejo
+  url: http://forgejo.org
+servers:
+  - url: /api/forgejo/v1
+paths:
+  /version:
+    get:
+      summary: API version
+      description: Semantic version of the Forgejo API
+      operationId: getVersion
+      responses:
+        '200':
+          description: successful operation
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Version'
+components:
+  schemas:
+    Version:
+      type: object
+      properties:
+        number:
+          type: string
+