Fix Reckless search command not finding partial matches

[evansmj]

The Reckless search command was only returning a result if you searched a perfect match, which is not too helpful. This updates the command so that partial search matches return a result.

Before:
reckless search bolt
Search exhausted all sources
reckless search bol
Search exhausted all sources
reckless search bolt12-pris
Search exhausted all sources

After:
reckless search bolt
Plugins matching 'bolt':
bolt12-prism (https://github.com/lightningd/plugins)
reckless search bol
Plugins matching 'bol':
bolt12-prism (https://github.com/lightningd/plugins)
reckless search bolt12-pris
Plugins matching 'bolt12-pris':
bolt12-prism (https://github.com/lightningd/plugins)

Important

25.12 FREEZE October 27th: Non-bugfix PRs not ready by this date will wait for 26.03.

RC1 is scheduled on November 10th

The final release is scheduled for December 1st.

Checklist

Before submitting the PR, ensure the following tasks are completed. If an item is not applicable to your PR, please mark it as checked:

• The changelog has been updated in the relevant commit(s) according to the guidelines.
• Tests have been added or modified to reflect the changes.
• Documentation has been reviewed and updated as needed.
• Related issues have been listed and linked, including any that this PR closes.