Also add newline to end of `verilog` modifier code blocks so that there
is always a newline between code blocks and following material.

Fix ChiselEnum warnings and use Logger for warnings instead of println

Previously, ChiselEnum would warn any time a UInt is converted to an
Enum. There was no way to suppress this warning. Now there is a factory
method (`.safe`) that does not warn and returns (Enum, Bool) where the
Bool is the result of calling .isValid on an Enum object. The regular
UInt cast is also now smarter and will not warn if all bitvectors of the
width of the Enum are legal states.

It also uses the same logger as the Builder so that if we ever refactor
that to be passed as an argument, it will be the same logger for both
Builder and warning reporting.

Fix aop.Select behavior for CloneModuleAsRecord

Previously, CloneModuleAsRecord clones would result in the same
BaseModule object coming up multiple times when using APIs like
.instances, .collectDeep, and .getDeep. This was not the intended
behavior and can lead to very subtle bugs.

* added to readme

* Update README.md

Co-authored-by: Jack Koenig <jack.koenig3@gmail.com>

Co-authored-by: Jack Koenig <jack.koenig3@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* deprecate getPorts with modulePorts.

* add doc to fullModulePorts and update deprecation notes.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Fix CloneModuleAsRecord support for .toTarget

* Add Clock
* Add Analog
* Add Interval
* Add line from User Types (...) to Record

* prototype annotating verif constructs

* switch to final class

* name emissions

* moving BaseSim to experimental

* adding name tests

* fixing quotation escapes

* emitting names, but everything has a default name

* only name things with provided/suggested names

* name every BaseSim node

* removing msg, unused imports

* fixing file exist calls

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Co-authored-by: Jiuyang Liu <liu@jiuyang.me>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

1. `TruthTable` is final now.
2. add return type for `TruthTable`

Co-authored-by: Jack Koenig <koenig@sifive.com>