feat(config): Support multiple configuration sources for an option (#128

)

Support for multiple configuration sources for an option, with
precedence ordering.

Fixes #127 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
  * Configuration options can now use multiple lookup keys.
* Keys are checked in a defined order, with fallback support when
earlier sources are unavailable.
  * Option descriptions clearly display configured lookup keys.
  * Supports combined use of a primary key and additional fallback keys.

* **Documentation**
* Updated configuration guidance with multi-key examples, precedence
details, and terminology.

* **Bug Fixes**
* Improved configuration resolution across supported YAML and JSON
sources.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

chore(release): Publish cli_tools 0.13.1 (#114)

- cli_tools@0.13.1

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Progress display is now more configurable, providing enhanced
flexibility and control over progress reporting options in CLI tools.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

chore(release): Publish cli_tools 0.13.0 (#111)

Publish next cli_tools with the improvements on the `Analytics` class.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
  * Ensures analytics events are reliably sent before the CLI exits.

* **Breaking Changes**
* Analytics behavior updated; callers may need to adapt to the new
lifecycle.

* **Bug Fixes**
  * Fixed an exception condition in progress reporting.
  * Restored progress spinner behavior for failed runner executions.

* **Documentation**
  * Updated changelog for the 0.13.0 release.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

 - Bumped minimum Dart SDK version to 3.6

 - Bumped minimum Dart SDK version to 3.6

 - **FEAT**(cli_tools): Added Logger.progressStream method  ([#108](#108)). ([fac111a](fac111a))

chore(release): Publish new package versions (#102)

Packages:
- cli_tools v0.11.0
- config v0.8.4


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
  * Added PostHog analytics integration
  * Made library name configurable in analytics settings

* **Bug Fixes**
  * Improved OptionResolution interface accessibility

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

chore(release): Publish new package versions (#102)

Packages:
- cli_tools v0.11.0
- config v0.8.4


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
  * Added PostHog analytics integration
  * Made library name configurable in analytics settings

* **Bug Fixes**
  * Improved OptionResolution interface accessibility

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

chore(release): Bump version (#97)

# Changes

Bump cli tools versions


I manually did this, melos doesn't seem to work, it says it cannot find
the package. Not sure what is going on there.