chore: bump version to 1.2.1

Merge pull request #5 from picahq/feat/authkit-support

feat: add support for authkit users to prompt connector adding

Merge pull request #4 from picahq/feat/require-explicit-connectors

feat: require explicit connectors in `PicaClientOptions`

Merge pull request #3 from picahq/feature/filter-connections-by-ident…

…ifiers

feat: allow passing identity and identity_type filters to PicaClientOptions

Merge pull request #2 from picahq/feature/add-additional-tools

feat: allow passing custom tools to create_pica_agent

Merge pull request #1 from picahq/additionaal-project-links

docs: additional project links to display on PyPi

chore: update README usage

chore: update README usage section