feat: @llamaindex/tools (#1755)

.changeset/seven-ligers-march.md

examples/agent/wiki.ts

examples/agentworkflow/blog-writer.ts

examples/anthropic/agent.ts

examples/mistral/agent.ts

examples/package.json

examples/vercel/llm.ts

examples/wiki.ts

packages/tools/.gitignore

packages/tools/package.json

packages/tools/src/helper.ts

packages/tools/src/index.ts

packages/tools/src/tools/code-generator.ts

packages/tools/src/tools/document-generator.ts

packages/tools/src/tools/duckduckgo.ts

packages/tools/src/tools/form-filling.ts

packages/tools/src/tools/img-gen.ts

packages/tools/src/tools/interpreter.ts

packages/tools/src/tools/openapi-action.ts

packages/tools/src/tools/weather.ts