api: implement logic for all (user and org)/reponame/projects endpoints and crud operations

create endpoints for each operation in the web router and corresponding handler and tested them manually

routers/api/v1/shared/project/project.go

@@ -0,0 +1,47 @@
+package project
+
+import (
+	"encoding/json"
+	"net/http"
+
+	project_model "code.gitea.io/gitea/models/project"
+	"code.gitea.io/gitea/services/context"
+)
+
+// MoveColumns moves or keeps columns in a project and sorts them inside that project
+func MoveColumns(ctx *context.APIContext) {
+	project, err := project_model.GetProjectByID(ctx, ctx.PathParamInt64(":id"))
+	if err != nil {
+		ctx.NotFoundOrServerError("GetProjectByID", project_model.IsErrProjectNotExist, err)
+		return
+	}
+	if !project.CanBeAccessedByOwnerRepo(ctx.ContextUser.ID, ctx.Repo.Repository) {
+		ctx.NotFound("CanBeAccessedByOwnerRepo", nil)
+		return
+	}
+
+	type movedColumnsForm struct {
+		Columns []struct {
+			ColumnID int64 `json:"columnID"`
+			Sorting  int64 `json:"sorting"`
+		} `json:"columns"`
+	}
+
+	form := &movedColumnsForm{}
+	if err = json.NewDecoder(ctx.Req.Body).Decode(&form); err != nil {
+		ctx.ServerError("DecodeMovedColumnsForm", err)
+		return
+	}
+
+	sortedColumnIDs := make(map[int64]int64)
+	for _, column := range form.Columns {
+		sortedColumnIDs[column.Sorting] = column.ColumnID
+	}
+
+	if err = project_model.MoveColumnsOnProject(ctx, project, sortedColumnIDs); err != nil {
+		ctx.ServerError("MoveColumnsOnProject", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, map[string]string{"message": "columns moved successfully"})
+}