feat!: add mcp conformance test infra (#585); add SSE reconnection with retry support (#596) (#585)

Adds a comprehensive conformance test suite for the Kotlin MCP SDK,
covering core protocol operations, tool calls, elicitation, resources,
prompts, and 20 OAuth/auth scenarios

- Conformance server and client implementations
- OAuth/auth test scenarios: JWT, authorization code flow, client
credentials, PKCE, scope handling, cross-app access, client registration
- CI workflow
- Baseline file for tracking expected failures
- Shell script

fixes:
- #592
- #593
- #596


## Remaining known failures (tracked issues, will be fixed directly in
`main`)

- [x] `tools-call-with-logging`, `tools-call-with-progress`,
`tools-call-sampling`, `tools-call-elicitation`,
`elicitation-sep1034-defaults`-  see #599,
- [x] `elicitation-sep1330-enums` - #587 #600
- [x] `initialize` - #588 
- [x] `tools_call`, `auth/scope-step-up`, `auth/scope-retry-limit` -
#589
- [ ] `elicitation-sep1034-client-defaults` - #414 
- [x] `sse-retry` - #590 
- [ ] `resources-templates-read` - #591 

## Breaking Changes
from #596 
- `StreamableHttpClientTransport` and
`mcpStreamableHttp`/`mcpStreamableHttpTransport`: old constructors
accepting `Duration` timeout are now `@Deprecated` — use the new
overloads with `ReconnectionOptions` instead
- `StreamableHttpClientTransport.close()` no longer calls
`terminateSession()` automatically

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

---------

Co-authored-by: Konstantin Pavlov <1517853+kpavlov@users.noreply.github.com>

build.gradle.kts

@@ -23,12 +23,15 @@ dependencies {
 subprojects {
     apply(plugin = "org.jlleitschuh.gradle.ktlint")
     apply(plugin = "org.jetbrains.kotlinx.kover")
-    apply(plugin = "dev.detekt")
 
-    detekt {
-        config = files("$rootDir/config/detekt/detekt.yml")
-        buildUponDefaultConfig = true
-        failOnSeverity.set(FailOnSeverity.Error)
+    if (name != "conformance-test" && name != "docs") {
+        apply(plugin = "dev.detekt")
+
+        detekt {
+            config = files("$rootDir/config/detekt/detekt.yml")
+            buildUponDefaultConfig = true
+            failOnSeverity.set(FailOnSeverity.Error)
+        }
     }
 }