docs: refresh bilingual READMEs and product showcase assets #6078

Job	Run time
Shell Deploy Scripts	10s
Build Impact	17s
Frontend Build	1m 44s
Rust / CLI Validation	4s
DSH Profile Packaging (windows-latest)	0s
Rust Build Check (${{ matrix.os }})	0s
CLI Tests (${{ matrix.os }})	0s
Impact-selected Linux / Relay Contract	0s
	2m 15s

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