Add Sindarin “muta cum liquida” words to sjn_list

According to the regular stress rules from Appendix E of The Lord of the
Rings, all three of these words should be stressed on the penultimate
(second) syllable, since that syllable is followed by two consonants;
however, the way they are used in poems suggests they should actually be
stressed on the antepenultimate (first) syllable (example: “in IMlaDRIS
it DWELLS”). According to Concerning Stress Placement In Sindarin [1],
this can be attributed to a hypothetical “muta cum liquida” rule like in
Latin, where some syllables count as light even if they’re followed by
two consonants, because both consonants belong to the following syllable
(e.g. IM-la-dris instead of im-LAD-ris). However, the rule is apparently
not applied systematically: according to [2], in another poem the word
“nogothrim”, which is quite similar in structure to “Nargothrond”, is
clearly stressed on the penultimate syllable. For this reason, we don’t
try to define the “muta cum liquida” rule in sjn_rules (or qya_rules),
but only add the three names Imladris, Menegroth and Nargothrond as
exceptions to the sjn_list.

[1]: https://menegroth.github.io/stress-in-sindarin.html
[2]: https://mildred-of-midgard.dreamwidth.org/158375.html#comment-cmt49575

dictsource/sjn_list

@@ -0,0 +1,8 @@
+// potential “muta cum liquida” rule:
+// the use of these words in poems suggests that they are stressed on the antepenultimate syllable,
+// rather than the penultimate one, even though the penultimate syllable is heavy;
+// see <https://menegroth.github.io/stress-in-sindarin.html> for details
+
+imladris	$1 // Seek for the Sword that was broken, line 2
+menegroþ	$1 // Lay of Leithian Recommenced, line 65
+nargoþrond	$1 // The world was young, the mountains green, line 13

tests/language-pronunciation.test

@@ -194,7 +194,7 @@ test_phon sd "s'Indhi b'o:li; 'Ind.o: jo:R'Vpi xa:nd'a:n s'a~: t[a:l'Vq R,@k#@nd
 J'Vnhn t['e: ,aRb'i: bo:l'i:;a J'o: b'I t[@m'a:m v'Vd.o: as'VR ,a:he:
 h'Ina v'aqt s'Indhi b'o:li s'Indh J'e: m'Vk# b'o:li_! 'ae~ d,@f@t['VRi z@b'a:n ,a:he:" "سنڌي ٻولي انڊو يورپي خاندان سان تعلق رکندڙ آريائي ٻولي آھي، جنھن تي عربي ٻوليءَ جو بہ تمام وڏو اثر آهي. هن وقت سنڌي ٻولي سنڌ جي مک ٻولي ۽ دفتري زبان آھي." "Arab"
 test_phon si "t'aw@t st#'a:n@ k'i:p@j,@kin w'a:rta: w'u: s'ul.u p'ipiri:m s'ah@ d'e:s@p,a:l@n@ p'akS@ k r'ija:k,a:ri:n 'at@r@ '&tiwu: g'&t.um h'e:tuwen 'ek 'ajeku m'ij@gos k'i:p@ d'eneku t'uwa:l@ l'aba: t'ibe:" "තවත් ස්ථාන කීපයකින් වාර්තා වූ සුළු පිපිරීම් සහ දේශපාලන පක්ෂ ක්‍රියාකාරීන් අතර ඇතිවූ ගැටුම් හේතුවෙන් එක් අයෙකු මියගොස් කීප දෙනෙකු තුවාල ලබා තිබේ." "Sinh"
-test_phon sjn "'alf 'aman 'amaRT 'amon 'aRag,oRn aRn'OIdi;,ad 'aRved,ui bel'eRi;,and b'oRom,iR bRag'ollax bR'eTil bRiT'ombaR bR'uinen k'aIR kaR'aDRas k,elebR'i:an kRiss'aEgRim d'eneT,oR dR'eNgist d'u::n ekT'eli;,on 'emyn eR'i;ad,oR f'ean,oR find'uilas f'iNgon fiNg'olfin fin'aRfin f'oRox,el g'alaD,on gal'adRi;,el gR'ond gw'aIhiR j'aRwaIn j'oReT iT'ili;,en loTl'o:Ri;,en miT'eITel miTR'andiR moR'annon m'oRi;,a oR'offin osg'ili;,aT pal'anti:R p,alant'i:Ri pel'ennoR p,eRi;'annaT sil'ivRen ToR'ondoR" "alph Aman Amarth Amon Aragorn Arnoediad Arvedui Beleriand Boromir Bragollach Brethil Brithombar Bruinen Cair Caradhras Celebrían Crissaegrim Denethor Drengist dûn Ecthelion Emyn Eriador Fëanor Finduilas Fingon Fingolfin Finarfin Forochel Galadhon Galadriel Grond Gwaihir Iarwain Ioreth Ithilien Lothlórien Mitheithel Mithrandir Morannon Moria Orophin Osgiliath Palantír Palantíri Pelennor Periannath Silivren Thorondor" "Sindarin"
+test_phon sjn "'alf 'aman 'amaRT 'amon 'aRag,oRn aRn'OIdi;,ad 'aRved,ui bel'eRi;,and b'oRom,iR bRag'ollax bR'eTil bRiT'ombaR bR'uinen k'aIR kaR'aDRas k,elebR'i:an kRiss'aEgRim d'eneT,oR dR'eNgist d'u::n ekT'eli;,on 'emyn eR'i;ad,oR f'ean,oR find'uilas f'iNgon fiNg'olfin fin'aRfin f'oRox,el g'alaD,on gal'adRi;,el gR'ond gw'aIhiR j'aRwaIn 'imladR,is j'oReT iT'ili;,en loTl'o:Ri;,en m'enegR,oT miT'eITel miTR'andiR moR'annon m'oRi;,a n'aRgoTR,ond oR'offin osg'ili;,aT pal'anti:R p,alant'i:Ri pel'ennoR p,eRi;'annaT sil'ivRen ToR'ondoR" "alph Aman Amarth Amon Aragorn Arnoediad Arvedui Beleriand Boromir Bragollach Brethil Brithombar Bruinen Cair Caradhras Celebrían Crissaegrim Denethor Drengist dûn Ecthelion Emyn Eriador Fëanor Finduilas Fingon Fingolfin Finarfin Forochel Galadhon Galadriel Grond Gwaihir Iarwain Imladris Ioreth Ithilien Lothlórien Menegroth Mitheithel Mithrandir Morannon Moria Nargothrond Orophin Osgiliath Palantír Palantíri Pelennor Periannath Silivren Thorondor" "Sindarin"
 test_phon sk "k'r:d;el^ St;'astni:Q d;'atl^ow 'utSi: pR'i;u:st;i: v'a:hu m'l:kveho k'on^a 'ophRi:zat; k'uoRu_:_: a ZR'at; tS'eRstve: m'eso
 p'et;ti:Zdn^,ove: v'l:tSata: n'eRvo:zn^e St;'ekaju: n'amu,ojho d;'atl^a_! v_ t'r:n^i:" "Kŕdeľ šťastných ďatľov učí pri ústí Váhu mĺkveho koňa obhrýzať kôru a žrať čerstvé mäso. Päťtýždňové vĺčatá nervózne štekajú na môjho ďatľa v tŕní." "Latn"
 test_phon sl "xiSn'i:tSin bR'a:tEts uzg'a:ja p'o:wZE p'o:t fik'u:sOm" "Hišničin bratec vzgaja polže pod fikusom." "Latn"