Deprecate Record.connect

[awygle]

Deprecate the unfortunate Record.connect method, and the Direction functionality of Record as well. Resolves #342 .

[codecov]

Codecov Report

Merging #368 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #368      +/-   ##
==========================================
+ Coverage   82.56%   82.58%   +0.02%     
==========================================
  Files          35       35              
  Lines        5952     5962      +10     
  Branches     1211     1213       +2     
==========================================
+ Hits         4914     4924      +10     
+ Misses        872      871       -1     
- Partials      166      167       +1     

Impacted Files	Coverage Δ
nmigen/hdl/rec.py	97.00% <100.00%> (+0.09%)	⬆️
nmigen/build/run.py	31.25% <0.00%> (ø)
nmigen/hdl/ir.py	95.47% <0.00%> (+0.05%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ed0f508...c88a927. Read the comment docs.

[whitequark]

I'm wondering if we should hold off merging this until #355 is done, since until #355 is done, we really can't encourage people to add their own methods to Record.

[awygle]

That is true (hence the deprecation message saying to connect fields manually). I am OK with holding off.

[whitequark]

Since (as discussed on the last meeting) we're likely going to deprecate Record entirely and instead provide packed structs and interfaces, I'm closing this.