chore: release v0.2.8

[ivov]

0.2.8 (upcoming)

• fix: adapt lowered fn arg shape at generic call boundary #459 ee69def
• fix: wrap go interface returns as option #458 79892a4
• ci: require IDE extension version bump on grammar change #457 d6613a0
• ci: add tree-sitter drift and test checks #454 5469274
• fix: bitwise tokens missing from tree-sitter parser #453 1748f26
• fix: align Go interface and impl pointer-return nilability #451 dba4c74
• fix: terminate generics parser at eof #450 6a8d718
• chore: rebuild playground #446 126dd8e
• fix: allow mutually recursive function-type aliases #445 14ac9f4
• ci: guard release workflows from running on forks #444 7f9c583
• feat: bitwise operators #382 bb5de34
• fix: qualify imported enum in variant-not-found diagnostic #442 4a02f60