feat: bootstrap buf.md

Signed-off-by: Matthis Holleville <matthish29@gmail.com>

protobuf/buf.md

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+# K8SGPT build spec
+
+## Managed by [k8sgpt-ai](https://github.com/k8sgpt-ai)
+
+This repository contains grpc service definitions that developers can use for interacting with [k8gpt](https://github.com/k8sgpt-ai/k8sgpt).
+
+### Analysis
+
+The module `schema.v1` contains a single `Service` with one rpc named `Analyze`. The request object for the `Analyze` method is `AnalyzeRequest`, which contains parameters for configuring the analysis. The response object for the `Analyze` method is `AnalyzeResponse`, which contains the results of the analysis.
+
+The `AnalyzeResponse` object contains an `Error` object, which can be used to indicate if an error occurred during the analysis. If an error occurred, the `errors` field will contain a list of error messages. The `status` field indicates the overall status of the analysis, and the `problems` field indicates the number of problems found during the analysis.
+
+The `results` field contains a list of `Result` objects, each of which describes an item analyzed by the tool. Each `Result` object contains a `kind` field that describes the type of item (e.g. Deployment, Pod, Service), a `name` field that specifies the name of the item, a list of `ErrorDetail` objects that describe any errors found during analysis of the item, a `details` field that contains additional information about the item, and a `parent_object` field that specifies the name of the parent object, if any.
+
+The `AnalysisItem` object represents an item that can be analyzed by the tool. It contains a name field that specifies the `name` of the item, and a `description` field that provides a brief description of the item.