feat(infra): distribute terraform modules under infra/terraform

POC: lift the homelab-grown nextcloud-mcp-server and
nextcloud-mcp-deployer-role Terraform modules into this repo so external
operators can consume them via a `git::` source.

Includes a top-level README documenting the two-phase deploy flow
(bootstrap deployer role with a copy-pasteable IAM policy, then assume the
role to deploy the MCP server) and supports both in-VPC Qdrant and
external/managed Qdrant modes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

infra/terraform/nextcloud-mcp-deployer-role/outputs.tf

@@ -0,0 +1,14 @@
+output "role_arn" {
+  description = "ARN of the deployer role; pass to STS AssumeRole or use as the assume_role target in a provider block."
+  value       = aws_iam_role.this.arn
+}
+
+output "role_name" {
+  description = "Name of the deployer role."
+  value       = aws_iam_role.this.name
+}
+
+output "policy_arn" {
+  description = "ARN of the inline-style managed policy attached to the role."
+  value       = aws_iam_policy.deployer.arn
+}