Add SPDX linter CI job

[XVilka]

Currently Rizin uses SPDX identificators but not all files were converted.
Thus, it's important to be consistent everywhere.

• Convert all missing files to SPDX identifiers
• Where copyright is missing add lines like:

SPDX-FileCopyrightText: © {$year_of_file_creation} {$name_of_copyright_holder} <{$contact}>

• Add a SPDX CI linter checker (reuse lint)

For example, header could look like this:

//  SPDX-FileCopyrightText: 2019 Jane Doe <jane@example.com>
//  SPDX-License-Identifier: GPL-3.0-or-later

Read more at https://reuse.software/tutorial/
Tools are:

• https://github.com/fsfe/reuse-tool
• https://reuse.readthedocs.io/en/stable/usage.html

Also related #209 (those files should be excluded from check)

[ret2libc]

https://reuse.software/faq/#quick-summary

[XVilka]

Current status:

rizin on  dev [$] took 40s 
[i] ℤ reuse lint                                                                                                                                                                                                                  13:53:58 
# MISSING COPYRIGHT AND LICENSING INFORMATION

The following files have no copyright and licensing information:
* librz/asm/arch/arm/winedbg/be_arm.h
* librz/asm/arch/ppc/libvle/vle.h
* librz/asm/arch/ppc/libvle/vle_internal.h
* librz/asm/arch/riscv/riscv-opc.h
* librz/asm/arch/spc700/spc700_opcode_table.h
* librz/asm/arch/tms320/c55x/table.h
* librz/asm/binutils_as.h
* librz/asm/p/asm_snes.h
* librz/bin/format/le/le.h
* librz/bin/format/le/le_specs.h
* librz/bin/format/mach0/coresymbolication.h
* librz/bin/format/mach0/fatmach0.h
* librz/bin/format/mach0/mach0.h
* librz/bin/format/mach0/mach0_specs.h
* librz/bin/format/ne/ne.h
* librz/bin/format/ne/ne_specs.h
* librz/bin/format/nin/gba.h
* librz/bin/format/nin/n3ds.h
* librz/bin/format/nin/nds.h
* librz/bin/format/nin/nin.h
* librz/bin/format/objc/mach064_classes.h
* librz/bin/format/objc/mach0_classes.h
* librz/bin/format/omf/omf.h
* librz/bin/format/omf/omf_specs.h
* librz/bin/format/pe/dotnet.h
* librz/bin/format/pe/pemixed.h
* librz/bin/format/psxexe/psxexe.h
* librz/bin/format/qnx/qnx_specs.h
* librz/bin/format/xbe/kernel.h
* librz/bin/format/xbe/xbe.h
* librz/bin/format/xnu/rz_cf_dict.h
* librz/bin/format/zimg/zimg.h
* librz/bin/mangling/demangler.h
* librz/bin/mangling/demangler_types.h
* librz/bin/mangling/microsoft_demangle.h
* librz/debug/p/bfvm.h
* subprojects/packagefiles/libzip-1.7.3/cmake-config.h.in
* subprojects/packagefiles/libzip-1.7.3/cmake-zipconf.h.in
* subprojects/packagefiles/libzip-1.7.3/create_zip_err_str.py
* subprojects/packagefiles/libzip-1.7.3/meson_options.txt
* subprojects/yxml/.gitignore
* test/unit/test_inflate_deflate.c


# SUMMARY

* Bad licenses:
* Deprecated licenses:
* Licenses without file extension:
* Missing licenses:
* Unused licenses:
* Used licenses: Apache-2.0, BSD-2-Clause, BSD-3-Clause, CC-BY-SA-4.0, CC0-1.0, GPL-1.0-or-later, GPL-2.0-only, GPL-2.0-or-later, GPL-3.0-or-later, LGPL-2.0-or-later, LGPL-2.1-only, LGPL-2.1-or-later, LGPL-3.0-only, MIT, MS-PL, NCSA, RSA-MD
* Read errors: 0
* Files with copyright information: 3073 / 3115
* Files with license information: 3073 / 3115

Unfortunately, your project is not compliant with version 3.0 of the REUSE Specification :-(

[XVilka]

This is relevant to us for all these copied third-party sources:

• Vendored subtrees and lint fsfe/reuse-tool#236
• Define precedence of information with REUSE.yaml fsfe/reuse-docs#70

[ret2libc]

We are almost there with this! :) We can do it!

[mxmehl]

So great to see you working on this!

Regarding CI jobs, I just would like to make sure you are aware of REUSE's information for developers. Including it in CI is simple, and you might also want to consider registering your project to the API to get a dynamic fancy badge to show off :)

[XVilka]

Roughly 40 files left to convert/account for.

[mxmehl]

Congratulations, good job!

If you want, you could also register the project at the REUSE API and get a shiny badge :)

[XVilka]

Done: https://api.reuse.software/info/github.com/rizinorg/rizin