* feat(cli): add reconfigure-user.php to read/write per-user config attributes
Closes#8869.
Adds `cli/reconfigure-user.php`, a first-class CLI for per-user configuration attributes — the user-level equivalent of the existing `reconfigure.php` (system config).
### Usage
```sh
# List all attributes (sensitive keys redacted by default)
./cli/reconfigure-user.php --user alice --list
./cli/reconfigure-user.php --user alice --list --show-secrets
# Read a single attribute (exit 2 if key not found)
./cli/reconfigure-user.php --user alice --key language
# Set an attribute (type inferred from existing value: bool, int, string)
./cli/reconfigure-user.php --user alice --key language --set --value fr
# Set from stdin (recommended for secrets — keeps value out of shell history / ps)
./cli/reconfigure-user.php --user alice --key some_token --set --value-stdin < token.txt
# Create a new key, e.g. for an extension (unknown keys rejected by default)
./cli/reconfigure-user.php --user alice --key my_ext_setting --set --value hello --force
# Delete an attribute (exit 2 if key not found)
./cli/reconfigure-user.php --user alice --key some_token --unset
```
### Changes
- `cli/reconfigure-user.php` — new command
- `lib/Minz/Configuration::toArray()` — exposes the full config array (used by `--list`)
- `cli/README.md` — documents the new command
- `tests/cli/UserConfigOptionsParserTest.php` — PHPUnit tests for the options parser, following the existing `CliOptionsParserTest` pattern (shared `cli-parser-test.php` helper)
### Test plan
- `make test-all` passes
- Tested manually against a local FreshRSS instance: `--list`, `--key` (get), `--set` (bool/int/string inference), `--value-stdin`, `--unset`, `--force`, error paths (unknown key without `--force`, wrong type)
* unserialize allowed_classes
---------
Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
