Improve project search with multi-word AND logic

[khashayarghafouri]

Updated the project search to support multiple words, requiring all words to match in project name or description. Added a tooltip to the search box to inform users about the new multi-word search capability.

[cobret-git]

Thanks for the contribution! However, this change makes search significantly more restrictive by requiring ALL words to match (AND logic) rather than finding substring matches. For example, searching "task pilot manager" on a project named "Task Manager" would no longer match because "pilot" is missing. This breaks the intuitive behavior users expect and makes search less forgiving overall. If you'd like to add multi-word search, could you rework this as an optional feature with OR logic instead, so it enhances rather than replaces the current behavior?

[cobret-git]

Sorry — I now understand why your request was written that way. My mistake for describing the issue incorrectly, using the wrong scenarios, and suggesting an incorrect implementation. I’ve updated the issue to reflect the correct behavior. If you’d like to adjust your code based on the updated description, you’re very welcome to do so.