Add connect-kotlin plugin (#371)

https://github.com/bufbuild/connect-kotlin

---------

Co-authored-by: Philip K. Warren <pwarren@buf.build>
Co-authored-by: Philip K. Warren <pkwarren@users.noreply.github.com>

Author: buildbreaker

plugins/bufbuild/connect-kotlin/.dockerignore

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+*
+!Dockerfile

plugins/bufbuild/connect-kotlin/source.yaml

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+source:
+  github:
+    owner: bufbuild
+    repository: connect-kotlin

plugins/bufbuild/connect-kotlin/v0.1.1/.dockerignore

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+*
+!Dockerfile

plugins/bufbuild/connect-kotlin/v0.1.1/Dockerfile

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+# syntax=docker/dockerfile:1.4
+FROM gradle:7.4.0-jdk17 AS build
+WORKDIR /app
+RUN git clone --depth 1 --branch v0.1.1 https://github.com/bufbuild/connect-kotlin.git
+WORKDIR /app/connect-kotlin
+RUN gradle --no-daemon -g $(pwd) protoc-gen-connect-kotlin:jar
+
+FROM gcr.io/distroless/java17-debian11
+WORKDIR /app
+COPY --from=build /app/connect-kotlin/protoc-gen-connect-kotlin/build/libs/protoc-gen-connect-kotlin.jar /app
+CMD ["/app/protoc-gen-connect-kotlin.jar"]

plugins/bufbuild/connect-kotlin/v0.1.1/buf.plugin.yaml

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+version: v1
+name: buf.build/bufbuild/connect-kotlin
+plugin_version: v0.1.1
+source_url: https://github.com/bufbuild/connect-kotlin
+description: Idiomatic gRPC & Connect RPCs for Kotlin.
+deps:
+  - plugin: buf.build/protocolbuffers/java:v21.12
+output_languages:
+  - kotlin
+spdx_license_id: Apache-2.0
+license_url: https://github.com/bufbuild/connect-kotlin/blob/v0.1.1/LICENSE

tests/testdata/buf.build/bufbuild/connect-kotlin/v0.1.1/eliza/plugin.sum

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+h1:FI2MrUOiuLhuiCRRKun/ZfbRS8icI66PfHVvL0+qe6M=

tests/testdata/buf.build/bufbuild/connect-kotlin/v0.1.1/petapis/plugin.sum

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+h1:dEgosZqAS6OH6/YNlonq7Lvp0tdvMu4gK9FZqkSyYGw=