initial devcontainer support

.devcontainer/Dockerfile

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+FROM debian:bookworm
+
+RUN apt-get update \
+ && DEBIAN_FRONTEND="noninteractive" apt-get install -y \
+      "build-essential" "autoconf" "bison" "re2c" "pkg-config" "zlib1g-dev" "libsqlite3-dev" "libpq-dev" "locales" \
+      "valgrind" "llvm" "clang" "gdb" "git" "ssh" \
+ && locale-gen "en_US.UTF-8"
+
+ENV LANGUAGE ""
+ENV LANG "en_US.UTF-8"
+ENV LC_ALL "C"

.devcontainer/compose.yaml

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+services:
+  shell:
+    build:
+      context: ./
+      dockerfile: ./Dockerfile
+    cap_add:
+      - SYS_ADMIN
+    security_opt:
+      - seccomp:unconfined
+    privileged: true
+    tty: true
+    depends_on:
+      - pgsql
+    environment:
+      PDO_PGSQL_TEST_DSN: "pgsql:host=pgsql port=5432 dbname=test user=test password=test"
+  pgsql:
+    image: postgres
+    environment:
+      POSTGRES_DB: test
+      POSTGRES_USER: test
+      POSTGRES_PASSWORD: test

.devcontainer/devcontainer.json

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+{
+    "name": "php-dev (for Codespaces)",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-vscode.cpptools",
+                "ms-vscode.cpptools-extension-pack",
+                "maelvalais.autoconf",
+                "ms-azuretools.vscode-docker",
+                "editorconfig.editorconfig",
+                "github.vscode-github-actions"
+            ]
+        }
+    },
+    "dockerComposeFile": "compose.yaml",
+    "service": "shell"
+}

.devcontainer/local/devcontainer.json

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+{
+    "name": "php-dev (for Local)",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-vscode.cpptools",
+                "ms-vscode.cpptools-extension-pack",
+                "maelvalais.autoconf",
+                "ms-azuretools.vscode-docker",
+                "editorconfig.editorconfig",
+                "github.vscode-github-actions"
+            ]
+        }
+    },
+    "dockerComposeFile": "./../compose.yaml",
+    "service": "shell",
+    "mounts": [
+        {
+            "type": "bind",
+            "source": "./../",
+            "target": "/workspace/php-src"
+        }
+    ],
+    "workspaceFolder": "/workspace/php-src"
+}