refactor: align repository tooling

[dev-jodee]

Summary

• Add root Prettier, Solana ESLint, TypeScript, and rustfmt config to match the common program repos.
• Move formatting and lint entry points to root package scripts and Just recipes.
• Remove the TS client Biome config/scripts and the webapp-local ESLint config/deps.
• Run the one-time Prettier/rustfmt/ESLint formatting pass across the repo.

Test Plan

• pnpm install --frozen-lockfile --ignore-scripts
• just check
• pnpm --filter @subscriptions/client build
• pnpm --filter webapp build
• pnpm --filter webapp test

Notes

• Kept tsup in the TS client for a separate follow-up because removing it changes the published package surface.
• Root ESLint owns webapp/src now, with targeted compatibility disables for the old webapp rules that would require behavioral rewrites.

[github-actions]

Compute Unit Report

Instruction	Samples	Min CUs	Max CUs	Avg CUs	Est Cost (Low) [SOL]	Est Cost (Med) [SOL]	Est Cost (High) [SOL]
cancel_subscription	11	1805	2129	2013	0.000005000	0.000005080	0.000006006
close_subscription_authority	7	1881	1916	1886	0.000005000	0.000005075	0.000005943
create_fixed_delegation	38	3619	15621	5229	0.000005001	0.000005209	0.000007614
create_plan	84	3540	17053	5025	0.000005001	0.000005201	0.000007512
create_recurring_delegation	27	3640	8145	4646	0.000005001	0.000005185	0.000007323
delete_plan	8	416	416	416	0.000005000	0.000005016	0.000005208
init_subscription_authority	142	7431	24351	12681	0.000005003	0.000005507	0.000011340
revoke_delegation	19	318	585	420	0.000005000	0.000005016	0.000005210
subscribe	21	6670	9670	7251	0.000005002	0.000005290	0.000008625
transfer_fixed	6	10097	17594	12596	0.000005003	0.000005503	0.000011298
transfer_recurring	17	10206	17794	11654	0.000005003	0.000005466	0.000010827
transfer_subscription	10	10473	17941	12580	0.000005003	0.000005503	0.000011290
update_plan	21	424	503	476	0.000005000	0.000005019	0.000005238

Generated: 2026-04-29