PDO plugin: Reflections

* com.noccy.pdo: Implemented reflection for PDO databases,
  tables and columns. Reflectors for MySQL and Sqlite.
* com.noccy.pdo: Added pdo:inspect command.
* com.noccy.docker: Added basic stack management and commands.
* com.noccy.docker: Moved commands to dedicated namespace.
* Environment: readConfig and writeConfig helper added, with
  a flag to use the global config dir ~/.config/spark.

plugins/com.noccy.pdo/Reflection/Reflector/SqliteTableReflection.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace SparkPlug\Com\Noccy\Pdo\Reflection\Reflector;
+
+use PDO;
+use SparkPlug\Com\Noccy\Pdo\PdoResource;
+use SparkPlug\Com\Noccy\Pdo\Reflection\ColumnReflectionInterface;
+use SparkPlug\Com\Noccy\Pdo\Reflection\TableReflectionInterface;
+
+class SqliteTableReflection implements TableReflectionInterface
+{
+
+    private PDO $pdo;
+
+    private array $columns = [];
+
+    public function __construct(PdoResource $db, string $table)
+    {
+        $pdo = $db->getPDO();
+
+        //$columnsQuery = $pdo->prepare("SELECT name FROM sqlite_schema WHERE type IN ('table','view') AND name NOT LIKE 'sqlite_%' ORDER BY 1;");
+        $columnsQuery = $pdo->prepare("pragma table_info({$table})");
+        $columnsQuery->execute();
+        $columns = $columnsQuery->fetchAll(PDO::FETCH_ASSOC);
+
+        if (count($columns) == 0) {
+            throw new \RuntimeException(sprintf("No such table %s in database", $table));
+        }
+
+        foreach ($columns as $column) {
+            $name = $column['name'];
+            $this->columns[$name] = new SqliteColumnReflection($db, $column);
+        }
+    }
+
+    public function getAllColumns(): array
+    {
+        return $this->columns;
+    }
+
+    public function getColumn(string $name): ?ColumnReflectionInterface
+    {
+        return $this->columns[$name] ?? null;
+    }
+}
+