Enable BM25 hybrid search for KB retrieval

What's Changed

• Update only the values when saving user settings. by @pengfeng in #127
• enable parser only mode, skip following chunking and embedding by @liuzi in #116
• Add Babel to docker build. by @pengfeng in #128
• Make topic list generation more fault tolerant. by @pengfeng in #129
• Make local search more fault-tolerant. by @pengfeng in #130
• Add content instructions to answers and extraction flow. by @pengfeng in #131
• Add content_instruction to flow_extract. by @pengfeng in #132
• Enable BM25 hybrid search function. by @pengfeng in #133
• Add new vectorstore test. by @pengfeng in #134
• Bump version to 1.0.17 by @pengfeng in #135
• Change DEFAULT_SEARCHER_TYPE to bm25_dense. by @pengfeng in #136

Full Changelog: 1.0.16...1.0.17

Add i18n support.

What's Changed

• Add i18n support for settings. by @pengfeng in #125
• Update version number to 1.0.16 by @pengfeng in #126

Full Changelog: 1.0.15...1.0.16

Sync version number with Pypi and web UI.

1.0.15

Bump version to 1.0.15 (#124)

Add Docker deployment function.

The first release with Docker setup.