Add Config import and export commands

[tezvi]

---

config-export

Exports all Moodle configuration settings from the mdl_config table to a JSON file.

This command allows administrators to back up all site configuration values for migration, backup, or review. The output is a JSON file mapping config names to their values.

Available options:

Option	Description
-o, --output-file	Output file for export (default: stdout).

Example 1: Export all config values to a file named config.json.

moosh config-export --output-file=config.json

Example 2: Export all config values to stdout.

moosh config-export

The output file will contain a JSON object, for example:

{
  "sitefullname": "My Moodle Site",
  "siteshortname": "moodle"
}

---

config-import

Imports Moodle configuration settings from a JSON file into the mdl_config table and purges all caches.

This command allows administrators to restore or update site configuration from a previously exported JSON file. By default, existing config values are overwritten. Use the --skip-existing option to only insert new config values.

⚠️ WARNING: This command modifies the database directly. Always back up your database before running.

Available options:

Option	Description
-i, --input-file	Input JSON file for import. (required)
-s, --skip-existing	Skip existing config values during import. (optional)

Example 1: Import config values from config.json, overwriting existing values.

moosh config-import --input-file=config.json

Example 2: Import config values from config.json, skipping existing values.

moosh config-import --input-file=config.json --skip-existing

After import, all Moodle caches are purged automatically.

The input file must be a JSON object mapping config names to values, for example:

{
  "sitefullname": "My Moodle Site",
  "siteshortname": "moodle"
}