[ImgBot] Optimize images (#8)

*Total -- 1,004.32kb -> 753.78kb (24.95%)

/ai-assistant/cms/Logo/DefaultLogo.png -- 19.33kb -> 9.05kb (53.17%)
/ai-assistant/cms/Logo/OpenAI/LogoDark.png -- 20.88kb -> 12.09kb (42.11%)
/ai-assistant/cms/Logo/OpenAI/Logo.png -- 19.41kb -> 11.51kb (40.69%)
/ai-assistant-product/doc/img/delete-ai-function.png -- 17.86kb -> 10.66kb (40.3%)
/ai-assistant-product/doc/img/assistant-details-functions.png -- 45.14kb -> 28.39kb (37.1%)
/ai-assistant-product/doc/img/all-ai-functions-list.png -- 60.33kb -> 37.96kb (37.08%)
/ai-assistant-product/doc/img/create-knowledge-page-ui.png -- 31.23kb -> 19.82kb (36.56%)
/ai-assistant-product/doc/img/assistant-templates-dialog.png -- 45.20kb -> 28.84kb (36.18%)
/ai-assistant-product/doc/img/ai-functions-management.png -- 63.98kb -> 41.99kb (34.37%)
/ai-assistant-product/doc/img/quick-setup-opensearch-windows.png -- 48.80kb -> 32.63kb (33.13%)
/ai-assistant-product/doc/img/models-management.png -- 40.17kb -> 27.62kb (31.25%)
/ai-assistant-product/doc/img/chat-dashboard.png -- 70.81kb -> 50.76kb (28.32%)
/ai-assistant-product/doc/img/assistant-management.png -- 76.73kb -> 59.22kb (22.82%)
/ai-assistant-product/doc/img/assistant-details-delete.png -- 93.49kb -> 75.15kb (19.62%)
/ai-assistant-product/doc/img/quick-setup-opensearch-result.png -- 28.52kb -> 24.39kb (14.46%)
/ai-assistant-product/doc/img/download-portal-doc.png -- 75.78kb -> 65.19kb (13.98%)
/ai-assistant-product/doc/img/assistant-details.png -- 160.66kb -> 141.49kb (11.93%)
/ai-assistant-product/doc/img/assistant-details-add-functions.png -- 23.02kb -> 20.56kb (10.7%)
/ai-assistant-product/doc/img/ai-model-test-connection.png -- 62.97kb -> 56.46kb (10.34%)

Signed-off-by: ImgBotApp <[email protected]>
Co-authored-by: ImgBotApp <[email protected]>