[cdac] Implement basic data stream reader and writer in C

[lambdageek]

Using the spec from #99299 implement a basic data stream writer and reader.

There's a couple of parts here:

• A basic reader/writer in standard C without the PAL in src/native so that we can reuse it for NativeAOT and Mono.
• A convenience C++ interface in coreclr.
• Initial data stream creation and basic type registration in coreclr

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Issue Details

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Author:	lambdageek
Assignees:	-
Labels:	area-System.IO
Milestone:	-

Tagging subscribers to this area: @tommcdon
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Issue Details

---

Using the spec from #99299 implement a basic data stream writer and reader.

There's a couple of parts here:

• A basic reader/writer in standard C without the PAL in src/native so that we can reuse it for NativeAOT and Mono.
• A convenience C++ interface in coreclr.
• Initial data stream creation and basic type registration in coreclr

Author:	lambdageek
Assignees:	-
Labels:	area-System.IO, area-Diagnostics-coreclr, untriaged
Milestone:	-

[lambdageek]

We went with a JSON contract descriptor in #100365, so a C reader no longer makes sense for a NativeAOT-based reader like in #100623