Changelog #98

#10476 (first contribution) add replace_try_expr_with_match assist:

#10447 (first contribution) implement enum variant code lens:

#10458 implement custom user snippets:

#10459 add "Generate constant" assist:

#10474 support let…​else.

#10499 make "mismatched arggument counts" diagnostic range more precise.

#10479 fix index out of bounds panic in name resolution.

#10456 avoid cycle when lowering predicates for associated item lookup.

#10482 fix inline_call trying to use an uncached syntax node in Semantics.

#10460 only add proc_macro to prelude in proc-macro crates.

#10477 fix parsing of macro call inside generic args.

#10449 fix parsing of Some(1..).

#10420 parse outer attributes on StructPatternEtCetera.

#10480 change snake case fix to match rustc implementation.

#10504 (first contribution) remove needless clones

#10467 optimize code lens for references and implementations.

#10494, #10495, #10496, #10497, #10501, #10507, #10508, #10509, #10510, #10512, #10514 start new macro test suite

#10457 remove support for pre-1.47 sysroots.

#10440 fix Clippy warnings and replace some if lets with match.