[WizzardSK]

Two new core pages, the Core List changes and one fix; this replaces #1228 and #1222.

• Sega - Lindbergh (linuxloader), library/linuxloader.md: the libretro core of Linux Loader (WizzardSK/linuxloader-libretro), on the buildbot for Linux x86_64 and Windows x64. Content, saves, controls and the core options as the current core declares them (Video, Input, Audio and the loader's Debug settings).
• Microsoft - MSX/MSX2/MSX2+/turbo R (openMSX), library/openmsx.md: the openMSX core (WizzardSK/openmsx-libretro), on the buildbot for Linux, Windows, macOS and Android. The core carries the C-BIOS machines and writes openMSX's share folder itself, so no BIOS is needed to start; machines, extensions, video options and the per-port devices.
• Core List (from Core list: sortable columns, notes filled in, cores not on the buildbot removed #1222): sortable columns (Material for MkDocs' tablesort recipe, docs/javascripts/tablesort.js), empty Notes filled in from the cores' description in the buildbot's info files, and the cores the buildbot does not build removed. Rebased onto current master: the rows added since (GameTank, HyperScanEmu, CoolbarEmu, piece-emu) are kept, NicaiEmu stays gone as on master, and linuxloader and openMSX are added.
• Beetle SuperGrafx: the Aspect Ratio option names the game that switches between the 256 and 352 modes "Asuka 100%"; it is Asuka 120% (as in Core option text: Asuka 120%, not Asuka 100% beetle-supergrafx-libretro#145).

The core options were dumped from the cores' current builds. Both pages are in the nav (Sega Emulation, Microsoft Emulation); mkdocs build --strict passes and so does typos on the changed files.