Add remainder of N++ messages

- [ ] NPPM_GETCURRENTSCINTILLA - lParam is `int*`
- [ ] NPPM_GETCURRENTLANGTYPE - lParam is `int*`
- [ ] NPPM_SETCURRENTLANGTYPE - value is carried in lParam instead of wParam
- [ ] NPPM_GETOPENFILENAMES - wParam is `TCHAR**`
- [ ] NPPM_GETSESSIONFILES - wParam is `TCHAR**`
- [ ] NPPM_SAVESESSION - lParam is a struct
- [ ] NPPM_GETOPENFILENAMESPRIMARY - wParam is `TCHAR**`
- [ ] NPPM_GETOPENFILENAMESSECOND - wParam is `TCHAR**`
- [ ] NPPM_ENCODESCI
- [ ] NPPM_DECODESCI
- [x] NPPM_GETBUFFERENCODING
- [x] NPPM_SETBUFFERENCODING
- [ ] NPPM_ALLOCATESUPPORTED
- [ ] NPPM_ALLOCATECMDID
- [ ] NPPM_ALLOCATEMARKER
- [ ] NPPM_MODELESSDIALOG - Probably not applicable
- [ ] NPPM_CREATESCINTILLAHANDLE - Probably not applicable
- [ ] NPPM_DESTROYSCINTILLAHANDLE - Probably not applicable
- [ ] NPPM_GETNBUSERLANG - Probably not applicable
- [ ] NPPM_GETMENUHANDLE - Probably not applicable
- [ ] NPPM_DMMSHOW - Probably not applicable
- [ ] NPPM_DMMHIDE - Probably not applicable
- [ ] NPPM_DMMUPDATEDISPINFO - Probably not applicable
- [ ] NPPM_DMMREGASDCKDLG - Probably not applicable
- [ ] NPPM_ADDTOOLBARICON - Probably not applicable
- [ ] NPPM_DMMGETPLUGINHWNDBYNAME - Probably not applicable
- [ ] NPPM_GETENABLETHEMETEXTUREFUNC - Probably not applicable
- [ ] NPPM_MSGTOPLUGIN - Probably not applicable
- [ ] NPPM_GETSHORTCUTBYCMDID - Probably not applicable
- [ ] NPPM_SETMENUITEMCHECK - Probably not applicable
- [x] NPPM_GETNBOPENFILES
- [x] NPPM_GETNBSESSIONFILES
- [x] NPPM_SAVECURRENTSESSION
- [x] NPPM_GETCURRENTDOCINDEX
- [x] NPPM_SETSTATUSBAR
- [x] NPPM_ACTIVATEDOC
- [x] NPPM_LAUNCHFINDINFILESDLG
- [x] NPPM_LOADSESSION
- [x] NPPM_DMMVIEWOTHERTAB
- [x] NPPM_RELOADFILE
- [x] NPPM_SWITCHTOFILE
- [x] NPPM_SAVECURRENTFILE
- [x] NPPM_SAVEALLFILES
- [x] NPPM_GETWINDOWSVERSION
- [x] NPPM_MAKECURRENTBUFFERDIRTY
- [x] NPPM_GETPLUGINSCONFIGDIR
- [x] NPPM_MENUCOMMAND
- [x] NPPM_TRIGGERTABBARCONTEXTMENU
- [x] NPPM_GETNPPVERSION
- [x] NPPM_HIDETABBAR
- [x] NPPM_ISTABBARHIDDEN
- [x] NPPM_GETPOSFROMBUFFERID
- [x] NPPM_GETFULLPATHFROMBUFFERID
- [x] NPPM_GETBUFFERIDFROMPOS
- [x] NPPM_GETCURRENTBUFFERID
- [x] NPPM_RELOADBUFFERID
- [x] NPPM_GETBUFFERLANGTYPE
- [x] NPPM_SETBUFFERLANGTYPE
- [x] NPPM_GETBUFFERFORMAT
- [x] NPPM_SETBUFFERFORMAT
- [x] NPPM_HIDETOOLBAR
- [x] NPPM_ISTOOLBARHIDDEN
- [x] NPPM_HIDEMENU
- [x] NPPM_ISMENUHIDDEN
- [x] NPPM_HIDESTATUSBAR
- [x] NPPM_ISSTATUSBARHIDDEN
- [x] NPPM_DOOPEN
- [x] NPPM_SAVECURRENTFILEAS
- [x] NPPM_GETCURRENTNATIVELANGENCODING
- [x] NPPM_GETLANGUAGENAME
- [x] NPPM_GETLANGUAGEDESC
- [x] NPPM_SHOWDOCSWITCHER
- [x] NPPM_ISDOCSWITCHERSHOWN
- [x] NPPM_GETAPPDATAPLUGINSALLOWED
- [x] NPPM_GETCURRENTVIEW
- [x] NPPM_DOCSWITCHERDISABLECOLUMN
- [x] NPPM_GETEDITORDEFAULTFOREGROUNDCOLOR
- [x] NPPM_GETEDITORDEFAULTBACKGROUNDCOLOR
- [x] NPPM_SETSMOOTHFONT
- [x] NPPM_SETEDITORBORDEREDGE
- [x] NPPM_SAVEFILE
- [x] NPPM_DISABLEAUTOUPDATE
- [x] NPPM_GETFULLCURRENTPATH
- [x] NPPM_GETCURRENTDIRECTORY
- [x] NPPM_GETFILENAME
- [x] NPPM_GETNAMEPART
- [x] NPPM_GETEXTPART
- [x] NPPM_GETCURRENTWORD
- [x] NPPM_GETNPPDIRECTORY
- [x] NPPM_GETCURRENTLINE
- [x] NPPM_GETCURRENTCOLUMN
- [x] NPPM_GETNPPFULLFILEPATH