[Feature Request]: Add JsonPeek and JsonPatch tasks

### Summary

Add support in MSBuild for handling JSON as structured data, roughly equivalent to the `XmlPeek`, `XmlPoke`, and `XslTransformation` tasks for XML.

### Background and Motivation

The ["Command line evaluation of MSBuild properties"](https://github.com/dotnet/msbuild/issues/3911#issuecomment-1478468822) feature will output JSON and JSON has become at least as common as XML but is not supported in MSBuild code.

### Proposed Feature

Create `JsonPeek` and `JsonPatch` tasks using System.Text.Json.

Like `XmlPeek` and `XslTransformation` (and unlike `XmlPoke`), the `JsonPeek` and `JsonPatch` tasks should accept input content as either strings or files.

### `JsonPeek`

`JsonPeek` would support querying JSON and would depend on a "location path" which should probably conform with the [JSONPath Draft RFC](https://datatracker.ietf.org/doc/html/draft-ietf-jsonpath-base). SQL Server has a definition for [JSON Path Expressions](https://learn.microsoft.com/en-us/sql/relational-databases/json/json-path-expressions-sql-server?view=sql-server-ver16) that seems to follow the RFC and there is a [JsonPath.Net](https://www.nuget.org/packages/JsonPath.Net) implementation.

`JsonPeek` would be equivalent to `XmlPeek`.

### `JsonPatch`

`JsonPatch` would support modifying JSON and would depend on the [JSON Patch Proposed Standard](https://datatracker.ietf.org/doc/html/rfc6902). There is a [JsonPatch.Net](https://www.nuget.org/packages/JsonPatch.Net) implementation. [JSON Patch support in ASP.NET](https://learn.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-7.0) uses Newtonsoft.Json.

The `JsonPatch` task may be considered to be like [`XslTransformation`](https://learn.microsoft.com/en-us/visualstudio/msbuild/xsltransformation-task?view=vs-2022). A weakness of [`XmlPoke`](https://learn.microsoft.com/en-us/visualstudio/msbuild/xmlpoke-task?view=vs-2022) is that it uses XPath to identify a node which it essentially can only replace. Because the patch document for JSON is generally simpler than an XSLT, `JsonPatch` is probably sufficient as an equivalent for both `XmlPoke` and `XslTransformation`.

### Alternative Designs

_No response_

Start by reading the existing XmlPeek, XmlPoke, and XslTransformation tasks and the System.Text.Json API. Define the task inputs and behavior for string or file content, JSONPath-style querying, and JSON Patch operations; done means both new tasks are implemented with documented, tested behavior consistent with the proposal.

Written by the indexing model from the issue text.