ci: add GitHub Actions 'test' workflow

* Add BMC mode to formal tests
* Adapt wishbone simulation testbench to new generics
* Integrate simulation PSL checks in Wishbone components
* Add generic for Simulation PSL checks to Wishbone components

* A lot of new checks are added to WishboneCheckerE unit
  trying to implement the rules of the Wishbone spec.
* An illegal use of the suffix implication instead of logical
  implicationis fixed in WishboneMasterE unit

* Add 1st initial version of WishBone checker unit
* Add Wishbone package with component & type declarations
* Replace WB slave register by dictionary

Typofix

Better use OSVVMs Alert package instead of AssertP routines

* New test case of local write & read at same time
* Add check for WB cycle dependent of WB master local write & read

Instead of using directed tests we switch to coverage driven ones
by using OSVVM capabilities.

The new setIter() procedure replaces the setFirst/setLast procedures
by implementing both versions. A new datatype t_dict_iter is added which
serves as parameter type for the setFirst() procedure.

A new stack implementation is added. It's a protected type t_stack,
included in the StackP package. It has the same methods like the
t_queue types but implements a stack logic instead of a queue one.
The t_stack type is tested in the StackT testbench.

There is a new procedure merge() to merge the content of 2 diicts into
a third one. This procedure is defined outside of the t_dict protected
type.

Also a new get() function returning the data as std_logic_vector.
is added. It is needed to save the data in a unconstrained access type
which is used inside the merge() procedure. This get() function is
public. It can be used when no error return value is needed as you
get with the get() procedure. Instead an assertion is triggered when
the given key isn't found.

Three new methods to support iteration over the keys stored in the
dictionary:

  * setFirst: set start of iterator to begin og dictionary
  * setLast: set start of iterator to end of dictionary
  * iter(dir): iterate over keys in dictionary in dir direction

The key pointer type t_dict_key_ptr is now moved to the public part
of the DictP package to support using in testbench code when saving the
keys with different lengths from iter() function.
Error return values are now of type t_dict_error with 3 possible values:
(NO_ERROR, KEY_INVALID, KEY_NOT_FOUND)

uint_bitsize(x) is used to calc number of bits needed for slv when
interpreted as natural and result as unsigned vector.

* one_hot(): returns true when slv is one hot coded
  * is_unknown(): return true when slv contains bits with unknown value
  * uint_to_slv(): converts natural to slv (unsigned)
  * slv_to_uint(): converts slv to natural (unsigned)

WB_WRITE & WB_READ check that a write/read transfer is started on the
WishBone bus if requested on the local port of the WishBoneMasterE unit
at the adequate time.