docs: Add certificate resource

Signed-off-by: Fabian Mettler <[email protected]>

docs/resources/certificate.md

@@ -0,0 +1,53 @@
+# incus_certificate
+
+Manages an Incus certificate.
+
+## Example Usage
+
+```hcl
+resource "incus_certificate" "client1" {
+  name        = "client1"
+  certificate = file("${path.module}/metrics.crt")
+}
+```
+
+## Project Restriction Example
+
+```hcl
+resource "incus_project" "project1" {
+  name = "project1"
+}
+
+resource "incus_certificate" "prometheus" {
+  name        = "prometheus"
+  description = "Prometheus Node Exporter Access"
+  restricted  = true
+  projects    = [incus_project.project1.name]
+  type        = "metrics"
+  certificate = file("${path.module}/metrics.crt")
+}
+```
+
+## Argument Reference
+
+* `name` - **Required** - Name of the certificate.
+
+* `certificate` - **Required** - The certificate.
+
+* `description` - *Optional* - Description of the certificate.
+
+* `type` - *Optional* - The type of certificate to create. Can be one of: client,
+  or metrics. If no type is specified, a client certificate is created.
+
+* `projects` - *Optional* -  List of projects to restrict the certificate to.
+
+* `restricted` - *Optional* -  Restrict the certificate to one or more projects.
+
+* `remote` - *Optional* - The remote in which the resource will be created. If
+  not provided, the provider's default remote will be used.
+
+## Attribute Reference
+
+The following attributes are exported:
+
+* `fingerprint` - The fingerprint of the certificate.