build: provide useful errors when process_lib versions mismatch

[nick1udwig]

Problem

Resolves #220

Solution

Check process_lib versions and, if they don't match, error out with a helpful error message.

Docs Update

None

Notes

Error looks like:

$ kit b --force
ERROR src/main.rs:1195: 
   0: Found different versions of kinode_process_lib in different crates:
      ^0.8.5	["my_lib"]
      ^0.9.0	["foo", "bar", "baz", "lol", "rofl"]

Location:
   src/build/mod.rs:393

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SPANTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

   0: kit::build::check_process_lib_version
      at src/build/mod.rs:380
   1: kit::build::execute
      at src/build/mod.rs:1275

Suggestion: Set all kinode_process_lib versions to be the same to avoid hard-to-debug errors.