[docs] improve explanation about what are OSS and commercial features

[adnanrahic]

From community member Mats:

I think it is a little bit difficult to infer this info (what's oss and what's commercal only) from the tracetest docs.

Read the full thread by Mats Taraldsvik in Tracetest Community Slack, here.

Todo:

• improve main landing page docs explaining what is OSS and commercial
• improve flow for users wanting each option
• improve dedicated pages for OSS and commercial with specifics on features

Context:

Available in OSS

• Tracetest Core functionality
• Test triggers: HTTP/GRPC, traceId, Kafka
• Test specs: selector language, assertions
• Test automation options: CLI, Deep Link

Available in commercial

• All the OSS features plus... All the usual commercial capability: SSO, accounts, organizations, roles, ability to run multiple environments, sharing, security.
• Additional Test triggers: Cypress, Playwright, updated k6, and upcoming Artillery integrations
• Grouping test runs: Availability to place a group of tests in a 'test run group', run them in parallel, and wait for all the tests to finish to give an overall 'pass / fail' (useful for stopping CI/CD processes when any of a group of test fails).
• Test coverage overview: New run tab to monitor actively running tests with extensive meta tagging and filtering.
• Upcoming secrets management.

[adnanrahic]

Here's a guide structure I really like: https://www.highlight.io/docs/getting-started/self-host/self-hosted-hobby-guide