feat(perf): ship client perf defaults via Default Options, add perf mods

Pack-side half of the client performance work (analysis/client-perf/).

- Add Default Options 21.1.8 (client). It copies config/defaultoptions/
  options.txt and extra/** into place only when the target is absent, so
  player changes are never clobbered. It is also client-only. packwiz
  `preserve` would also land these files in this repo's server config, which
  matters for DistantHorizons.toml [server]/[common] and SSRD's COMMON config.
- Seed provisional mid-tier defaults generated by
  analysis/client-perf/proposed-configs/build.py --ship: render distance 8,
  DH LOD radius 128 / SSAO off / 2 threads, EMF animation LOD 12, Flywheel
  TRI_LINEAR lighting, LambDynamicLights fast, SSRD 16 chunks, Sound Physics
  16 rays / 2 bounces plus per-tick caps on noisy Create sounds. All values
  are unmeasured; Phase 2 (BENCH-MATRIX.md) replaces them. ModernFix
  dynamic_resources is held back until bench block B6 passes.
- Add Sodium Extra 0.9.4, Reese's Sodium Options 2.2.4, BadOptimizations
  2.4.1 and Particle Core 0.3.3 (all client-side). Their declared ranges match
  the pins (Sodium 0.8.13, fzzy_config, Kotlin for Forge).
- Bump Puzzles Lib 21.1.62 -> 21.1.64 as a bugfix: 21.1.63 restores dropped
  access transformers. The event-cache change in 21.1.64 is Fabric-only.

mods/reeses-sodium-options.pw.toml

@@ -0,0 +1,13 @@
+name = "Reese's Sodium Options"
+filename = "reeses-sodium-options-neoforge-2.2.4+mc1.21.1.jar"
+side = "client"
+
+[download]
+url = "https://cdn.modrinth.com/data/Bh37bMuy/versions/XjF2IkL8/reeses-sodium-options-neoforge-2.2.4%2Bmc1.21.1.jar"
+hash-format = "sha512"
+hash = "a99d41a41ca83376c4fa29ed22a99e98288a7e9a4749fbf6d3724b9804b8e66648e267c6851a53d040069fdc2d889f8205cbb444bee10a35be840d13fc9ed477"
+
+[update]
+[update.modrinth]
+mod-id = "Bh37bMuy"
+version = "XjF2IkL8"