Absorb qtgraphs submodule

commit877b130f368c1752e4f9bd9bda17be431902c01e
parente2ddf163220002baba5508333d51123dd0c6aefe
parent8faa85e4da210b01bcf5162f433e62eea46a9af7
authormozsearch-qt index builder <mozsearch-qt@localhost>
committermozsearch-qt index builder <mozsearch-qt@localhost>
commit timeThu, 29 Oct 2026 16:26:51 +0000