This makes `parser.c` follow the https://generated.at/ convention for generated files. This potentially allows any compatible IDE to discourage editing it directly.
(cherry picked from commit 52d2865365)
Problem: Linking different parsers into one executable fails due to duplicate symbols.
Solution: Mark `TSCharacterRange` as `static` when generating parsers.
fixes#4209
(cherry picked from commit 8138dba800)
Introduces a new function that takes in a supertype symbol and returns
all associated subtypes. Can be used by query.c to give better errors
for invalid subtypes, as well as downstream applications like the query
LSP to give better diagnostics.
