feat(src/terraform): add terraform feature

Author: bartventer

src/terraform/NOTES.md

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+
+
+## Licensing
+
+On August 10, 2023, HashiCorp announced a change of license for its products, including Terraform. After ~9 years of Terraform being open source under the MPL v2 license, it was to move under a non-open source BSL v1.1 license, starting from the next (1.6) version. See https://github.com/hashicorp/terraform/blob/main/LICENSE
+
+## OS Support
+
+This Feature should work on recent versions of Arch Linux-based distributions with the `pacman` package manager installed.
+
+`bash` is required to execute the `install.sh` script.

src/terraform/devcontainer-feature.json

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+{
+    "id": "terraform",
+    "version": "0.1.0",
+    "name": "Terraform, tflint, and TFGrunt",
+    "documentationURL": "https://github.com/bartventer/devcontainer-features/tree/main/src/terraform",
+    "description": "Installs the Terraform CLI and optionally Terragrunt and TFLint. Auto-detects latest version and installs needed dependencies.",
+    "options": {
+        "installTerragrunt": {
+            "type": "boolean",
+            "default": true,
+            "description": "Install Terragrunt, a thin wrapper for Terraform that provides extra tools for working with multiple Terraform modules"
+        },
+        "tflint": {
+            "type": "string",
+            "proposals": [
+                "latest",
+                "0.47.0",
+                "0.46.1"
+            ],
+            "default": "latest",
+            "description": "Tflint version (https://github.com/terraform-linters/tflint/releases)"
+        },
+        "installSentinel": {
+            "type": "boolean",
+            "default": false,
+            "description": "Install sentinel, a language and framework for policy built to be embedded in existing software to enable fine-grained, logic-based policy decisions"
+        },
+        "installTFsec": {
+            "type": "boolean",
+            "default": false,
+            "description": "Install tfsec, a tool to spot potential misconfigurations for your terraform code"
+        },
+        "installTerraformDocs": {
+            "type": "boolean",
+            "default": false,
+            "description": "Install terraform-docs, a utility to generate documentation from Terraform modules"
+        },
+        "httpProxy": {
+            "type": "string",
+            "default": "",
+            "description": "Connect to a keyserver using a proxy by configuring this option"
+        }
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "HashiCorp.terraform",
+                "ms-azuretools.vscode-azureterraform"
+            ],
+            "settings": {
+                "terraform.languageServer.enable": true,
+                "terraform.languageServer.args": [
+                    "serve"
+                ],
+                "azureTerraform.terminal": "integrated"
+            }
+        }
+    },
+    "installsAfter": [
+        "ghcr.io/bartventer/devcontainer-features/common-utils"
+    ]
+}