Add native speech synthesis and voice-imitation faculty

speech.el: formant/glottal integer DSP synthesis + voice-analyze-by-
imitation. voice-profile.el / voice-ingest.el: voice-profile plumbing.
accent.el: British-RP as an ingested transform-geometry (explicitly marked
provisional/citation-pending by its own comments). organ-read.el:
engram read-through for the speech organ. Includes demo/test drivers and
non-personal reference data (British-RP phonetics/lexicon derived data,
a public-domain LibriVox RP reference recording).

Deliberately excludes elp/data/live/ (raw recorded voice + face-photo
samples of the repo owner) and the will-*.{json,psv} derived voiceprint
files — personal biometric data that shouldn't be committed to a shared
repo without an explicit decision from the owner. Also excludes this
worktree's elp/src/surface-profile.el, which diverges from the copy in
other worktrees (agent-aaf04b0a9714c4070, main) — needs manual
reconciliation before landing, left out here to avoid silently picking a
version.

elp/data/lexicon.psv

@@ -0,0 +1,20 @@
+# pronunciation lexicon SOURCE — word -> phoneme sequence, as INGESTIBLE DATA.
+# Pronunciation is linguistic KNOWLEDGE (the language faculty's orthography->
+# phonology map), ingested into the engram, not frozen in code. The render reads
+# a word's phoneme sequence back from the engram. Covers the self-lexicon and the
+# proof sentences; general G2P is the realizer/morphology faculty's remit.
+# Diphthongs are written as two vowel targets (the render's transitions glide
+# between them). Format: word|PH1 PH2 PH3 ...
+i|AA IY
+am|AE M
+neuron|N UW R AA N
+is|IH Z
+memory|M EH M ER IY
+hello|HH EH L OW
+the|DH AH
+a|AH
+remember|R IH M EH M ER
+i'm|AA IY M
+you|Y UW
+here|HH IY R
+will|W IH L