docs: update stale documentation for recent SDK additions

[AndrewAltimit]

Summary

• Add psp::audiocodec module (hardware codec decoder for MP3/AAC/ATRAC3/ATRAC3plus) to syscall bindings and Platform SDK tables
• Add psp::hook module (kernel syscall hooking with inline fallback) to Platform SDK and Kernel Mode tables
• Add psp::sys::sctrl (SystemCtrlForKernel CFW API) to syscall bindings and Kernel Mode tables
• Add SrcChannel to psp::audio entry (sample rate conversion channel)
• Add find_sync() and ID3v2 tag parsing to psp::mp3 entry
• Fix codec syscall count (5 not 10) after sceAudiocodec* was un-gated from kernel-only
• Update syscall count (~825 -> ~829) and module count (36+ -> 38+)
• Update kernel mode description in CLAUDE.md and AGENTS.md

Test plan

• Verify all documented modules exist in psp/src/lib.rs
• Verify syscall count via grep
• Confirm markdown table formatting is correct
• Visual review of README rendering on GitHub

Generated with Claude Code

[github-actions]

Gemini AI Code Review

Issues

(none)

Previous Issues

(none)

Suggestions

• README.md:137 - The psp::hook module is added to the "Graphics & Rendering" table in the Platform SDK section. Given it deals with kernel syscall hooking and CFW plugins, it would be more appropriately placed in the "Kernel & Hardware" table (which already exists and contains me and hw).
• README.md:101 - Consider adding skip_id3v2() to the "Key API" column for psp::mp3 to match the level of detail provided for find_sync().

Notes

• 2 claim(s) were automatically filtered as potential hallucinations (file:line content didn't match claims)

• Verified that psp::audiocodec exists as both a high-level module (psp/src/audiocodec.rs) and as syscall bindings (psp/src/sys/codec.rs).

• Confirmed that sceAudiocodec* syscalls are indeed available in user mode (exported in sys/mod.rs without kernel gate), justifying their move from the "Kernel-only" section.

• The syscall count update (~825 to ~829) is a reasonable approximation of the current bindings.

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Generated by Gemini AI (gemini-3-flash-preview). Supplementary to human reviews.

[AndrewAltimit]

Review Response Agent (Iteration 1)

Status: No changes needed

Fixed Issues

• (none)

Ignored Issues

• Gemini suggestion to move psp::hook from "Graphics & Rendering" to "Kernel & Hardware" — verified this is incorrect; psp::hook is already in the "Kernel-Only" section at README.md:137, not in "Graphics & Rendering". The line number mapping was wrong.
• Gemini suggestion to add skip_id3v2() to psp::mp3 Key API column — optional polish, not a bug. The description column already mentions "ID3v2 tag parsing" which covers this functionality.
• Codex review — failed to execute due to OpenAI rate limit (HTTP 429). No feedback produced.

Deferred to Human

• (none)

Notes

• This is a docs-only PR (3 markdown files, +16/-10 lines). No code changes to review for bugs.
• Both Gemini suggestions were either based on incorrect line mapping or were minor polish items, not actionable issues.

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The agent reviewed feedback but determined no code changes were required.