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What kind of change does this PR introduce?

Made core search results more similar to Arduino IDE 1.8.x search dialog

What is the current behavior?

Search results are slightly different from Arduino IDE 1.8.x (especially if the query contains non-alphanumeric charactes)

What is the new behavior?

The search result should be the same (or at least much more similar)

Does this PR introduce a breaking change, and is titled accordingly?

No breaking

Other information

for reference the Arduino IDE 1.8.x uses this filter function:

    // Filter ContributedPlatformReleases based on search terms
    contributions.removeIf(releases -> {
      for (ContributedPlatform platform : releases.releases) {
        String compoundTargetSearchText = platform.getName() + "\n"
                                          + platform.getBoards().stream()
                                              .map(ContributedBoard::getName)
                                              .collect(Collectors.joining(" "));
        if (!filter.test(platform)) {
          continue;
        }
        if (!stringContainsAll(compoundTargetSearchText, filters))
          continue;
        return false;
      }
      return true;
    });

In the current implementation of the arudino-cli we use some more fields to extend the search (like FQBN or vendor URL).