Build a tower client for LDK

[sr-gi]

Let's build for LDK:

• Add tower logic to LDK sample (or a fork ok it)
• Create a simple code snippet that can be plugged into any project building on top of LDK

[sr-gi]

This should now be possible (lightningdevkit/rust-lightning#2337)

[moneyball]

Any takers? :)

[aruokhai]

Taking it as part of Bitcoin FOSS Program

[sr-gi]

In case it is useful, this is a (really outdated) test of the PR adding tower support to LDK:
sr-gi/ldk-sample@4af2914
lightningdevkit/rust-lightning#2337 (comment)

[aruokhai]

@sr-gi, i face lots of bitcoin and lightning libraries incompatibility issues while implementing Ldk-integeration. The incompatibility issue arises due to my need to use Locator, Appointment, UserId structures, among others which resides in teos-common module The needed changes in rust-lightning was added in v0.0.119 , which depends on rust-bitcoin ^0.30.2, while teos-common depends on lightning = "0.0.108" and bitcoin = "0.28.0". Currently i am working a new branch to update bitcoin and lightning libraries, what do you think ?