fix typos and wording in docs and config examples

[maradini77]

Description

• README: corrected “go through” phrasing and “with no error” warning text.
• docs/architecture.md: fixed “an npm package” wording for plugins.
• docs/configuration.md: removed stray colon from avoid-tx-origin rule key in sample config.

[dbale-altoros]

thanks @maradini77 for the feedback