Overhaul VirtFusion provider: 20 resources, 30 data sources, multipage pagination

Complete rewrite of the VirtFusion Terraform provider with full API coverage:

- 20 managed resources (server, build, SSH key, user, firewall, IP blocks, etc.)
- 30 data sources (hypervisors, packages, servers, IP blocks, self-service, etc.)
- New HTTP client with proper error handling, query parameter support, and
  automatic multipage pagination via GetAllPages (fetches all pages from
  Laravel-style paginated endpoints and merges into a single response)
- Fixed type mismatches against live API: ServerData.Suspended (int→bool),
  IPBlockData.Type (string→int), PackageData json tags (primaryStorage, etc.),
  ServerData nested CPU/Settings/Resources structure, HypervisorGroupResources
  array response
- Configurable results-per-page (default 300) on all list data sources
- Migrated CI from GitHub Actions to Gitea Actions
- Updated goreleaser config, go.mod dependencies, and examples

Verified against live VirtFusion instance at cp.vps.ezscale.tech:
all data sources return correct data with full pagination support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/provider/data_source_servers_by_user.go

@@ -0,0 +1,121 @@
+// Copyright (c) EZSCALE.
+// SPDX-License-Identifier: MPL-2.0
+
+package provider
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"terraform-provider-virtfusion/internal/client"
+
+	"github.com/hashicorp/terraform-plugin-framework/attr"
+	"github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/types"
+)
+
+var _ datasource.DataSource = &ServersByUserDataSource{}
+var _ datasource.DataSourceWithConfigure = &ServersByUserDataSource{}
+
+// NewServersByUserDataSource returns a new data source for listing servers by user.
+func NewServersByUserDataSource() datasource.DataSource {
+	return &ServersByUserDataSource{}
+}
+
+// ServersByUserDataSource defines the data source implementation.
+type ServersByUserDataSource struct {
+	client *client.Client
+}
+
+// ServersByUserDataSourceModel describes the data source data model.
+type ServersByUserDataSourceModel struct {
+	UserID  types.Int64 `tfsdk:"user_id"`
+	Results types.Int64 `tfsdk:"results"`
+	Servers types.List  `tfsdk:"servers"`
+}
+
+func (d *ServersByUserDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
+	resp.TypeName = req.ProviderTypeName + "_servers_by_user"
+}
+
+func (d *ServersByUserDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
+	resp.Schema = schema.Schema{
+		MarkdownDescription: "Use this data source to list all VirtFusion servers owned by a specific user.",
+		Attributes: map[string]schema.Attribute{
+			"user_id": schema.Int64Attribute{
+				MarkdownDescription: "The user ID to filter servers by.",
+				Required:            true,
+			},
+			"results": resultsSchemaAttribute(),
+			"servers": schema.ListNestedAttribute{
+				MarkdownDescription: "The list of servers owned by the user.",
+				Computed:            true,
+				NestedObject: schema.NestedAttributeObject{
+					Attributes: serverDataSourceSchemaAttributes(),
+				},
+			},
+		},
+	}
+}
+
+func (d *ServersByUserDataSource) Configure(_ context.Context, req datasource.ConfigureRequest, resp *datasource.ConfigureResponse) {
+	if req.ProviderData == nil {
+		return
+	}
+
+	c, ok := req.ProviderData.(*client.Client)
+	if !ok {
+		resp.Diagnostics.AddError(
+			"Unexpected Data Source Configure Type",
+			fmt.Sprintf("Expected *client.Client, got: %T. Please report this issue to the provider developers.", req.ProviderData),
+		)
+		return
+	}
+
+	d.client = c
+}
+
+func (d *ServersByUserDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
+	var data ServersByUserDataSourceModel
+	resp.Diagnostics.Append(req.Config.Get(ctx, &data)...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	result, err := d.client.GetAllPages(ctx, fmt.Sprintf("/servers/user/%d?%s", data.UserID.ValueInt64(), resultsQueryParam(data.Results)))
+	if err != nil {
+		resp.Diagnostics.AddError("Error Reading Servers By User", err.Error())
+		return
+	}
+
+	var listResp client.ServerListResponse
+	if err := json.Unmarshal(result, &listResp); err != nil {
+		resp.Diagnostics.AddError("Error Parsing Servers Response", err.Error())
+		return
+	}
+
+	serverObjects := make([]attr.Value, len(listResp.Data))
+	for i, s := range listResp.Data {
+		obj, diags := types.ObjectValue(
+			serverDataSourceAttrTypes(),
+			serverDataToAttrValues(s),
+		)
+		resp.Diagnostics.Append(diags...)
+		if resp.Diagnostics.HasError() {
+			return
+		}
+		serverObjects[i] = obj
+	}
+
+	serversList, diags := types.ListValue(types.ObjectType{AttrTypes: serverDataSourceAttrTypes()}, serverObjects)
+	resp.Diagnostics.Append(diags...)
+	if resp.Diagnostics.HasError() {
+		return
+	}
+
+	data.Servers = serversList
+
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}