Ollama integration

[rohit-kadhe]

Description

Please include a summary of the changes and the related issue to help is review the PR better and faster.

Checklist for adding new integration:

• Defined APIS in constants folder.
• Updated SERVICE_PROVIDERS in common.ts
• Created a folder under instrumentation with the name of the integration with atleast patch.ts and instrumentation.ts files.
• Added instrumentation in allInstrumentations in init.ts and to the InstrumentationType in types.ts files.
• Added examples for the new integration in the examples folder.
• Updated package.json to install new dependencies for devDependencies.
• Updated the README.md of langtrace-typescript-sdk to include the new integration in the supported integrations table.
• Updated the README.md of Langtrace's repository to include the new integration in the supported integrations table.
• Added new integration page to supported integrations in Langtrace Docs