[GSoC .NET Bindings for UNO, Week 5] bridge research and small fixes

[Ritobroto Mukherjee]

Hello everyone,

Continuations from previous work:
- The patch to add a configure switch to disable the old CLI bindings
on Windows was completed and merged.
- ARM64 links to dotnet binaries were added to the lode patch. The
patch was also merged, so newer patches from this point on will be CI
tested.
- Uploaded a small fix patch, after learning that the netmaker patch
broke out-of-source-directory builds. Awaiting review and merge here:
https://gerrit.libreoffice.org/c/core/+/169353.

A brief update on this week's progress:
- After a discussion in the weekly meeting with Mr. Hossein and Mr.
Thorsten, I've decided to switch to working on the in-process bridge
first (and continue work on the out-of-process bridge afterwards taking
the GSoC schedule into consideration). So most of the week was spent
researching existing language bridges, and experimenting with P/Invoke
and embedding the .NET Runtime into LO.

Best regards,
Ritobroto