Copy build files from reform-handbook

Making an attempt at getting this packaged up so we have a reform-handbook equivalent on the pocket reform.

I've made some decisions here that I'm not even remotely married to, it's just easier to prompt the discussion with examples:

• Calling the package pocket-reform-handbook and the equivalent command pocket-reform-handbook. Instead we'll leave it to reform-help to route the user to the right command. This means that users on either platform can also look at the docs for the other one.
• I've left minute and josch as the maintainer and uploader respectively
• I've simply duplicated the original changelog entry from reform-handbook
• I've tested the html and pdf building and it works just fine, didn't know if anything else needed looking at

A debuild -b -uc -us successfully completed a build with the following lintian errors:

Now running lintian pocket-reform-handbook_1.0_arm64.changes ...
E: pocket-reform-handbook changes: bad-distribution-in-changes-file reform
E: pocket-reform-handbook: no-copyright-file
W: pocket-reform-handbook: no-manual-page [usr/bin/pocket-reform-handbook]
W: pocket-reform-handbook: wrong-bug-number-in-closes #XXXXXX [usr/share/doc/pocket-reform-handbook/changelog.gz:3]
Finished running lintian.

Let me know if anything needs changing or a different approach is needed.