feat: reorganize api route files

feat: optimize recommend skills cache & speed up page open

chore(release): web v0.7.6

feat: enhance first page speed

feat: harden indexnow owner handles and site origin

feat: align indexnow key handling and backfill flow

feat: add indexnow submissions and sitemap backfill

chore(release): web v0.7.5

feat: enhance file scoping & indexing

feat: add --repo param

chore(release): web v0.7.4

feat: extend session expire time

chore(release): web v0.7.3

fix: wrong logics in submit skills

feat: enhance sitemap stabilities