docs: streamable server sample (#595)

- add a simple streamable http server example with auth
- update readme: replace quickstart example from sse server to
streamable server
- add readme files for samples, simple-streamable-server, notebooks

closes #170 

## How Has This Been Tested?
knit and inspector

## Breaking Changes
NaN

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [x] 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
- [ ] I have added appropriate error handling
- [x] I have added or updated documentation as needed

samples/simple-streamable-server/gradle/libs.versions.toml

@@ -0,0 +1,22 @@
+[versions]
+kotlin = "2.2.21"
+ktor = "3.2.3"
+mcp-kotlin = "0.9.0"
+slf4j = "2.0.17"
+shadow = "9.2.2"
+
+[libraries]
+ktor-bom = { group = "io.ktor", name = "ktor-bom", version.ref = "ktor" }
+ktor-server-netty = { group = "io.ktor", name = "ktor-server-netty" }
+ktor-server-cors = { group = "io.ktor", name = "ktor-server-cors" }
+ktor-server-content-negotiation = { group = "io.ktor", name = "ktor-server-content-negotiation" }
+ktor-serialization-kotlinx-json = { group = "io.ktor", name = "ktor-serialization-kotlinx-json" }
+ktor-server-auth = { group = "io.ktor", name = "ktor-server-auth" }
+ktor-server-sse = { group = "io.ktor", name = "ktor-server-sse" }
+mcp-kotlin-server = { group = "io.modelcontextprotocol", name = "kotlin-sdk-server", version.ref = "mcp-kotlin" }
+slf4j-simple = { group = "org.slf4j", name = "slf4j-simple", version.ref = "slf4j" }
+
+[plugins]
+kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+kotlin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version.ref = "kotlin" }
+shadow = { id = "com.gradleup.shadow", version.ref = "shadow" }

samples/simple-streamable-server/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists