Add support for type function statements

[jeparlefrancais]

Closes #261

This PR adds support for Luau type functions 🎉

More info about type functions: https://luau.org/typecheck/type-functions

• update bundler to handle exported type functions
• add entry to the changelog

[github-actions]

Coverage after merging type-function-statement into main will be

87.34%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
ast_converter.rs	88.65%	100%	91.15%	88.52%	1043, 1067, 1087–1089, 1110, 1125–1127, 1175, 1179–1182, 1215, 1235, 1250, 1275, 1313, 1332–1334, 1379, 1413, 1428, 1444–1446, 1456, 1461–1463, 1478–1479, 1498, 1645–1647, 1708–1710, 1761–1763, 1787–1788, 1825–1827, 1855–1857, 1861–1863, 1926–1928, 1953–1955, 1962–1964, 1982–1984, 2008–2010, 2080, 2085–2087, 2107, 2113–2115, 2120–2122, 2147–2149, 2169, 218–220, 2226–2228, 2252–2255, 2285–2287, 2293–2295, 2298–2300, 235–236, 2362–2364, 237, 2376–2378, 2382–2384, 2398–2399, 2405–2406, 2420–2421, 2449, 2532–2534, 2562–2564, 2585–2587, 2617–2620, 2635–2636, 2639, 265–266, 2663–2665, 267, 2677–2679, 2699–2701, 2756–2758, 2790, 3133–3140, 3142–3143, 3145–3147, 3151–3162, 3171, 3173–3176, 3180–3183, 3188, 3214–3216, 3227–3229, 3247–3249, 488–490, 494–496, 543, 604, 619–621, 656–659, 666, 680, 695–697, 701–703, 718–721, 724, 733–735, 776–777, 787–789, 795–797, 840, 862, 957, 961–963, 984
parser.rs	88.55%	100%	94.12%	87.72%	23–24, 31–32, 568–570, 573, 73–77, 89
src/generator
dense.rs	88.07%	100%	93.41%	87.54%	1012–1019, 1045–1051, 1065–1067, 1085–1089, 1097, 1106–1107, 1112, 1118, 1127–1135, 1152, 1174, 1187–1190, 1194–1197, 159–160, 162, 176–177, 179, 253–265, 267–273, 275–276, 287–289, 368, 417, 50, 507, 51–53, 55, 57–59, 61, 614–616, 62–63, 65, 650, 66–67, 671, 68–69, 721, 740, 80, 923, 968, 985
mod.rs	98.65%	100%	100%	98.54%	391, 407, 411
readable.rs	97.24%	100%	99.04%	97.07%	1163, 1214–1218, 1270, 1323–1325, 1392, 1419, 1449, 182, 187–188, 192, 205–206, 211, 216, 234–235, 415, 48, 50–53, 55, 657–658
token_based.rs	93.12%	100%	94.53%	92.98%	1003–1004, 1011, 1026, 1031–1035, 1054–1055, 1068–1069, 1090–1091, 1105–1107, 1130–1131, 1140–1142, 1161–1162, 1171–1173, 1224–1229, 1383, 139–140, 1480, 1517–1525, 156–157, 1636–1638, 1670–1679, 169–170, 1723, 1781, 191–192, 212–214, 2248–2249, 2308–2312, 2532, 2536, 254, 2549, 306–310, 380–381, 387, 399, 459–460, 482–483, 499–500, 542, 630–631, 664–665, 699–700, 762–763, 804–805, 853–857, 874, 89, 920–922, 993–994
src/nodes
function_body.rs	100%	100%	100%	100%
src/nodes/statements
mod.rs	92.39%	100%	100%	90.79%	102–103, 93, 95–98
type_function.rs	86.27%	100%	84.09%	86.77%	132–135, 148–150, 188–192, 195–197, 245–247, 255, 76–80
src/process
node_processor.rs	97%	100%	96.94%	97.06%	108, 44, 67
post_visitor.rs	94.64%	100%	98.36%	94.23%	146–147, 149–152, 164–166, 169, 173, 220–222, 225, 229, 247–249, 279–281, 293–295, 298, 302, 330, 337, 89–91
visitors.rs	100%	100%	100%	100%
src/rules
filter_early_return.rs	96.72%	100%	100%	96.08%	22–23
remove_comments.rs	94.51%	100%	91.50%	95.49%	297, 341, 422, 499–501
remove_spaces.rs	99.21%	100%	100%	98.99%	253
remove_types.rs	100%	100%	100%	100%
replace_referenced_tokens.rs	96.15%	100%	96.49%	96.06%	171–173, 182, 258–261
shift_token_line.rs	95.85%	100%	96.30%	95.72%	171–173, 268–271, 95
src/rules/bundle
rename_type_declaration.rs	98.34%	100%	100%	98.09%	175–176, 80
src/utils
lines.rs	77.78%	100%	92.86%	75.89%	107, 111, 117–118, 126, 182–193, 195–196, 198–201, 206, 214, 222–226, 228, 230–238, 240, 272, 274, 64–65