Add assertion helpers and make playwright a peer dependency

Commits

• refactor: make playwright a peer dependency fdb74b2
• feat: add base interaction class d13f692
• fix: include assertion decorator inside plugins import f6fa2ee
• fix: breaking tests 4795811
• feat: add page assertions 445e3a5
• refactor: use --headed flag to turn off headless mode 3b6840e

v0.1.0-0...v0.2.0-0

Full Changelog: v0.1.0-0...v0.2.0-0