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_hypervisor_groups.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/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/types"
+)
+
+var (
+	_ datasource.DataSource              = &HypervisorGroupsDataSource{}
+	_ datasource.DataSourceWithConfigure = &HypervisorGroupsDataSource{}
+)
+
+// NewHypervisorGroupsDataSource returns a new hypervisor groups data source.
+func NewHypervisorGroupsDataSource() datasource.DataSource {
+	return &HypervisorGroupsDataSource{}
+}
+
+// HypervisorGroupsDataSource defines the data source implementation.
+type HypervisorGroupsDataSource struct {
+	client *client.Client
+}
+
+// HypervisorGroupsDataSourceModel describes the data source data model.
+type HypervisorGroupsDataSourceModel struct {
+	Results types.Int64                `tfsdk:"results"`
+	Groups  []HypervisorGroupItemModel `tfsdk:"groups"`
+}
+
+// HypervisorGroupItemModel describes a single hypervisor group in the list.
+type HypervisorGroupItemModel struct {
+	ID      types.Int64  `tfsdk:"id"`
+	Name    types.String `tfsdk:"name"`
+	Enabled types.Bool   `tfsdk:"enabled"`
+}
+
+func (d *HypervisorGroupsDataSource) Metadata(_ context.Context, req datasource.MetadataRequest, resp *datasource.MetadataResponse) {
+	resp.TypeName = req.ProviderTypeName + "_hypervisor_groups"
+}
+
+func (d *HypervisorGroupsDataSource) Schema(_ context.Context, _ datasource.SchemaRequest, resp *datasource.SchemaResponse) {
+	resp.Schema = schema.Schema{
+		MarkdownDescription: "Fetches all VirtFusion hypervisor groups.",
+		Attributes: map[string]schema.Attribute{
+			"results": resultsSchemaAttribute(),
+			"groups": schema.ListNestedAttribute{
+				MarkdownDescription: "List of hypervisor groups.",
+				Computed:            true,
+				NestedObject: schema.NestedAttributeObject{
+					Attributes: map[string]schema.Attribute{
+						"id": schema.Int64Attribute{
+							MarkdownDescription: "The hypervisor group ID.",
+							Computed:            true,
+						},
+						"name": schema.StringAttribute{
+							MarkdownDescription: "The hypervisor group name.",
+							Computed:            true,
+						},
+						"enabled": schema.BoolAttribute{
+							MarkdownDescription: "Whether the hypervisor group is enabled.",
+							Computed:            true,
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func (d *HypervisorGroupsDataSource) 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.", req.ProviderData),
+		)
+		return
+	}
+
+	d.client = c
+}
+
+func (d *HypervisorGroupsDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
+	var data HypervisorGroupsDataSourceModel
+
+	rawResp, err := d.client.GetAllPages(ctx, fmt.Sprintf("/compute/hypervisors/groups?%s", resultsQueryParam(data.Results)))
+	if err != nil {
+		resp.Diagnostics.AddError("Error Reading Hypervisor Groups", err.Error())
+		return
+	}
+
+	var listResp client.HypervisorGroupListResponse
+	if err := json.Unmarshal(rawResp, &listResp); err != nil {
+		resp.Diagnostics.AddError("Error Parsing Hypervisor Groups Response", err.Error())
+		return
+	}
+
+	data.Groups = make([]HypervisorGroupItemModel, len(listResp.Data))
+	for i, g := range listResp.Data {
+		data.Groups[i] = HypervisorGroupItemModel{
+			ID:      types.Int64Value(g.ID),
+			Name:    types.StringValue(g.Name),
+			Enabled: types.BoolValue(g.Enabled),
+		}
+	}
+
+	resp.Diagnostics.Append(resp.State.Set(ctx, &data)...)
+}