RPCS3: bring the page up to date with the current core

[WizzardSK]

The RPCS3 page described an early build of the core: its supported formats, PKG install behaviour, log location and core options were out of date (pointed out by NNshi, who tests the core).

• Platforms: macOS (Apple Silicon, Intel) and Android x86_64 added.
• Loading: games in folder form by PS3_DISC.SFB or PARAM.SFO (.sfb/.sfo added to the extensions), and why that matters for per-game options.
• PKG: where it is installed, and the .rap license copied along.
• Setup: the folder layout now (rpcs3_detailed.log in system/rpcs3, dev_hdd1, patches/, Windows' config/ subfolder, vfs.yml, the user name file).
• New section on the settings database override and the Patch Manager (the core's own patch settings, not standalone's patch_config.yml).
• Features: rumble and native cheats (game patches) supported; no PS3 peripherals beyond the DualShock 3.
• Core options regenerated from the core's current option definitions (the menu-hidden ones left out).

Checked with typos and a local mkdocs build.