feat(KB): file-to-embedding worker pool (#32)

Because

users want upload the file to build their knowledgebase and the files in
knowledge base need to turn into vectors.

This commit

implement a file-to-embedding work pool.

Note: It is still in progress until preset/pipelines on instill cores
are ready.

.gitignore

@@ -0,0 +1,122 @@
+# From https://github.com/github/gitignore
+
+#### Visual Studio Code
+.vscode
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+#### Python
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Sphinx documentation
+docs/_build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Cython debug symbols
+cython_debug/
+
+# Auto-gen files
+autogen
+
+# mysql persistent data
+mysql-persistence/
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+/openapi
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# built binary
+artifact-backend
+
+# local protogen-go
+protogen-go
+
+# deploy config file
+deploy.yaml
+
+# air related files and folders
+.air.toml
+tmp
+
+.DS_Store
+
+# local files
+/config/config_local.yaml
+test_.pdf
+test_.md