Implements SD-JWT

sdjwt/build.gradle.kts

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+repositories {
+  mavenCentral()
+  maven {
+    url = uri("https://repo.danubetech.com/repository/maven-public")
+  }
+  maven("https://jitpack.io")
+  maven("https://repository.jboss.org/nexus/content/repositories/thirdparty-releases/")
+}
+
+dependencies {
+  implementation("com.nimbusds:nimbus-jose-jwt:9.34")
+  implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.15.3")
+  implementation("org.bouncycastle:bcprov-jdk15to18:1.77")
+
+  testImplementation(project(":dids"))
+  testImplementation(project(":crypto"))
+  testImplementation("io.github.erdtman:java-json-canonicalization:1.1")
+}
+
+tasks.test {
+  useJUnitPlatform()
+}

sdjwt/src/README.md

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+# SD-JWT support in Kotlin
+
+`sdjwt` is a library that implements the IETF draft for [Selective Disclosure for JWTs](https://www.ietf.org/archive/id/draft-ietf-oauth-selective-disclosure-jwt-05.html).
+This library facilitates creating SD-JWT structures for issuance and presentation with arbitrary payloads, and performing
+verification from the holder or from the verifier's perspective.
+
+## Table of Contents
+- [Installation](#installation)
+- [Quick Start](#quick-start)
+- [API REFERENCE](#api-reference)
+
+## Installation
+
+Add the following to your `gradle.build.kts` file:
+
+```kotlin
+repositories {
+  maven(url = "https://jitpack.io")
+}
+
+dependencies {
+  implementation("com.github.TBD54566975.web5-kt:sd-jwt:main-SNAPSHOT")
+}
+```
+
+## Quick Start
+
+See the test named `whole flow from issuer to holder to verifier` from [this file](./test/kotlin/web5/security/SdJwtTest.kt).
+You can run it by cloning this repo and running gradle as shown below:
+
+```shell
+go clone github.com/TBD54566975/web5-kt.git
+cd web5-kt/
+./gradlew sdjwt:test
+```
+
+## API Reference
+See our [oficial kotlin docs](https://tbd54566975.github.io/web5-kt/docs/htmlMultiModule/sdjwt/index.html).
+