* chore(deps): update submodule goutils
* docs(http): remove default client from README.md
* refactor(rules): introduce block DSL, phase-based execution, and flow validation
- add block syntax parser/scanner with nested @blocks and elif/else support
- restructure rule execution into explicit pre/post phases with phase flags
- classify commands by phase and termination behavior
- enforce flow semantics (default rule handling, dead-rule detection)
- expand HTTP flow coverage with block + YAML parity tests and benches
- refresh rules README/spec and update playground/docs integration
- Default rules act as fallback handlers that execute only when no matching non-default rule exists in the pre phase
- IfElseBlockCommand now returns early when a condition matches with a nil Do block, instead of falling through to else blocks
- Add nil check for auth handler to allow requests when no auth is configured
* fix(rules): buffer log output before writing to stdout/stderr
* refactor(api/rules): remove IsResponseRule field from ParsedRule and related logic
* docs(rules): update examples to use block syntax
* Add comprehensive post-request rules support for response phase
* Enable response body, status, and header manipulation via set commands
* Refactor command handlers to support both request and response phases
* Implement response modifier system for post-request template execution
* Support response-based rule matching with status and header checks
* Add comprehensive benchmarks for matcher performance
* Refactor authentication and proxying commands for unified error handling
* Support negated conditions with !
* Enhance error handling, error formatting and validation
* Routes: add `rule_file` field with rule preset support
* Environment variable substitution: now supports variables without `GODOXY_` prefix
* new conditions:
* `on resp_header <key> [<value>]`
* `on status <status>`
* new commands:
* `require_auth`
* `set resp_header <key> <template>`
* `set resp_body <template>`
* `set status <code>`
* `log <level> <path> <template>`
* `notify <level> <provider> <title_template> <body_template>`
