LSP: add lsp hints for better copybook handling

[GitMensch]

The LSP currently only works very partially if there is a copybook used.
Examples:

copy1 -> part of WORKING-STORAGE, uses constant-names
copy2 -> constant names used in copy1
copy3 -> constant names used in copy3
copy4 -> part of PROCEDURE DIVISION
copy5 -> sections used in copy4

There was an old discussion on "the other cobol extension" before it dropped GnuCOBOL, I think we should support its syntax and add something on top. The following would be coded in copy1

*> @source-dependency copy2.cpy

while copy2 may have something like

*> @source-dependency common/copy3.lib

and so on.

The LSP would parse for those and try to resolve them if it is in "copybook mode" (= not for copybooks parsed from within a program)

[GitMensch]

The above would be the "original feature", the extension would be a regex - as very common the copybooks have prefixes/suffixes.
Possible definitions:

*> @source-dependency s#CP#CW#

Would use the current copybook name and replace all CP by CW (no matter at start or end) - could be made to start/end with adjusting the regex

*> @source-dependency s#/src/test/#/src/include/#

would search for the same name, but in the folder "include" instead of "test".

... and the last suggested change: allow to set default source-dependency options configurable per project (those would also be passed to the LSP and handled in copybook-mode [maybe only if none are setup there, or as a baseline]).
This would, using the regex option, allow to support many procedure-division copybooks correctly nearly out-of the box.