v0.1.11 SDK Tiering first round

What's Changed

• chore: add .idea/ to .gitignore by @maxisbey in #111
• Update warning message in README.md by @Kludex in #112
• feat: add --expected-failures baseline and composite GitHub Action by @maxisbey in #113
• feat: add DNS rebinding protection conformance tests by @pcarleton in #115
• feat: add core and extensions suites for SDK tiering by @pcarleton in #117
• feat: add pre-registration conformance test by @pcarleton in #120
• docs: add SDK integration guide and fix spec references by @pcarleton in #121
• feat: add PKCE conformance tests by @pcarleton in #119
• feat: add resource parameter validation tests (RFC 8707) by @pcarleton in #118

New Contributors

• @Kludex made their first contribution in #112

Full Changelog: v0.1.10...v0.1.11