perf: use treesitter to detect math/markup

lua/typstar/snippets/math.lua

@@ -63,6 +63,7 @@ return {
     snip('rrn', 'RR^n ', {}, math),
     snip('cc', 'cases(\n\t<>\n)\\', { i(1, '1') }, math),
     snip('pi', 'pi ', {}, math),
+    snip('in', 'in ', {}, math),
     snip('(.*)iv', '<>^(-1)', { cap(1) }, math),
     snip('(.*)sr', '<>^(2)', { cap(1) }, math),
     snip('(.*)rd', '<>^(<>)', { cap(1), i(1, 'n') }, math),

lua/typstar/snippets/visual.lua

@@ -14,7 +14,7 @@ local operations = { -- boolean denotes whether an additional layer of () bracke
     { 'vi',  '1/(',         ')', true },
     { 'bb',  '(',           ')', false },
     { 'sq',  '[',           ']', true },
-    { 'abs', '|',           '|', false },
+    { 'abs', 'abs(',        ')', false },
     { 'ul',  'underline(',  ')', false },
     { 'ol',  'overline(',   ')', false },
     { 'ub',  'underbrace(', ')', false },