add rudimentary kdb-x module support

[gyorokpeter]

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[gyorokpeter]

Load a legacy module in a similar manner to kdb-x use.

This requires the module to have a module.q that loads whatever we want to return from the „use”.

This will return any new namespaces created by the module. Note that changes to existing namespaces (except .finos.dep as it’s needed as part of the loading mechanism) or variables in the root namespace are not returned.
Example using a modified version of qx86:

~/gyorokpeter/qx86$ cat module.q
.finos.dep.include"util.q";
.finos.dep.include"blockmem.q";
.finos.dep.include"x86das.q";
.finos.dep.include"x86asm.q";
.finos.dep.include"x86emu.q";

$ q
KDB-X 5.0 2026.01.22 Copyright (C) 1993-2026 Kx Systems
...

q)\l /.../finos/kdb/q/finos_init.q
include: loading file /.../finos/kdb/q/dep/dep.q
q).finos.dep.regModule["qx86";"0.0.0";"/.../qx86";"";""]
q).finos.dep.useModule"qx86"
include: loading file //qx86/module.q
include: loading file /.../qx86/util.q
include: loading file /.../qx86/blockmem.q
include: loading file /.../qx86/x86das.q
include: loading file /.../qx86/x86asm.q
include: loading file /.../qx86/x86emu.q
x86util | ``shex`i2le`le2i`sx32`flipTopBit!(::;{first ` vs .Q.s $[-4h=type x;x;0x00 vs x]};{$[-4h=type x;enlist ..
blockmem| ``new`write`read`unitTest!(::;{([]addr:`long$();data:())};{[bm;offset;content]
    offset:`long$offset..
x86das  | ``reg1`reg1alt`reg2`reg4`reg8`sreg`bcHandler`disasm00`disasm010`disasm011`disasm01`disasm0`disasm10`di..
x86asm  | ``parseMemPart`parseMemArg`parseHexNum`parseArg`regCode`oneop`twoop`jump`bitshift`arithm`bitscan`handl..
x86emu  | ``blankState`eflags`uneflags`smv`gmv`lea`evalOperand`push`set`typematch`operandSize`sx`setFlags`handle..

Load a KDB-X module using finos.

$ q
KDB-X 5.0 2026.01.22 Copyright (C) 1993-2026 Kx Systems
...

q).Q.m.SP,:enlist"/.../finos/kdb/q";
q)use`finos;
include: loading file /.../finos/kdb/q/dep/dep.q
q).finos.dep.regModule["qbinparse";"0.0.0";"/.../qbinparse";"";""]
q)binp:use`finos:qbinparse;
q)binp
parse        | {[schema;data;mainType]
    if[debug; `:::lastExample set (schema;data;mainType)];
    lib.parse[..
parseRepeat  | code
unparse      | code
compileSchema| {[schema]
    if[-11h=type schema;
        schema:enlist schema;
    ];
    schema:$[11h=type sch..

This implementation still pollutes the global namespace with .finos (until the finos code itself is modulified), and the target cannot use .finos.dep.include (but it should be using :: paths anyway). Also this is the one where I had to pull out internal bits of the .Q.m functions to make it work so it may be subject to change.