update READMEs

packages/anastasis-core/README.md

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+# anastasis-core
+
+This package implements the core client logic of Anastasis in TypeScript.

packages/anastasis-webui/README.md

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+# anastasis-webui
+
+This package implements a web-based client UI for GNU Anastasis.

packages/demobank-ui/README.md

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 # Taler Demobank UI
 
+Web-based user interface for the libeufin demobank.
+
 ## CLI Commands
 
 - `pnpm install`: Installs dependencies

packages/taler-harness/README.md

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+# taler-harness
+
+This package implements the `taler-harness` CLI tool.  It contains integration
+tests for GNU Taler and GNU anastasis, as well as various helpers for managing
+deployments of GNU Taler.

packages/taler-wallet-cli/README.md

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+# taler-wallet-cli
+
+This package provides `taler-wallet-cli`, the command-line interface for the
+GNU Taler wallet.

packages/taler-wallet-core/README.md

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+# taler-wallet-core
+
+This package implements `taler-wallet-core`, the main logic and storage
+for the GNU Taler wallet.

packages/taler-wallet-embedded/README.md

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+# taler-wallet-embedded
+
+Minimal wrapper and build system code to make `taler-wallet-core` run
+on embedded interpreters (currently NodeJS via akono, and `quickjs-tart`).

packages/taler-wallet-webextension/README.md

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+# taler-wallet-webextension
+
+This package contains the implementation of the GNU Taler wallet browser extension,
+using the cross-browser WebExtension APIs.

packages/web-util/README.md

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+# web-util
+
+Common utilities for other web applications in this repository.