Delete cw_zano / cw_tron / cw_solana / cw_decred packages + all references

These chains were already disabled in availableWalletTypes (none of them
were getting created), but the source dirs and the codegen scaffolding
for them still lived in tree (~20K lines of dead Dart).

Surgery:
- Delete cw_decred/ cw_solana/ cw_tron/ cw_zano/ source trees
- Strip 5 generate*() function bodies from tool/configure.dart
  (generateSolana, generateTron, generateZano, generateDecred,
  generateZcash) plus their top-level imports, args, calls,
  signatures, and conditional pubspec/walletTypes injection blocks.
  configure.dart shrinks from 2134 to 1561 lines and dart analyze
  is clean.
- Strip solana/tron secrets config + output paths from
  tool/import_secrets_config.dart
- Delete scripts/{android,ios,macos}/build_decred.sh,
  scripts/ios/build_zano{,_all}.sh
- Patch scripts/{android,ios,macos}/build_all.sh,
  scripts/android/copy_monero_deps.sh, scripts/ios/setup.sh,
  scripts/ios/gen_framework.sh to drop decred/zano steps
- Patch scripts/android/docker/build.sh + Dockerfile.final to drop the
  decred Docker stage; delete scripts/android/docker/Dockerfile.decred
- Update .github/workflows/build-linux.yml comments to reflect the
  remaining cw_* module list (evm, nano, bitcoin)

Note: WalletType.{solana,tron,zano,decred,zcash} enum values still live
in cw_core/lib/wallet_type.dart and there are dead switch cases in
lib/di.dart and lib/new-ui/pages/*.dart that reference them. Those
paths are unreachable (the enum values never get assigned to any wallet)
but cleaning them up is a separate hygiene pass.

scripts/android/docker/Dockerfile.decred

@@ -1,17 +0,0 @@
-ARG BASE_IMAGE
-ARG TORCH_IMAGE
-
-FROM ${TORCH_IMAGE} AS torch_source
-
-FROM --platform=linux/amd64 ${BASE_IMAGE} AS build
-
-RUN mkdir -p /w/scripts/android
-RUN mkdir -p /w/cw_decred/lib/api
-COPY --from=torch_source /w/scripts/torch_dart /w/scripts/torch_dart
-COPY cw_core/pubspec.yaml /w/cw_core/pubspec.yaml
-COPY cw_decred/pubspec.yaml /w/cw_decred/pubspec.yaml
-COPY scripts/android/build_decred.sh /w/scripts/android/build_decred.sh
-RUN /w/scripts/android/build_decred.sh
-
-FROM --platform=linux/amd64 alpine
-COPY --from=build /w /w

scripts/android/docker/Dockerfile.final

@@ -3,14 +3,12 @@ ARG TORCH_IMAGE
 ARG REOWN_IMAGE
 ARG BITBOX_IMAGE
 ARG MONERO_IMAGE
-ARG DECRED_IMAGE
 ARG MWEBD_IMAGE
 
 FROM ${TORCH_IMAGE}  AS torch_src
 FROM ${REOWN_IMAGE}  AS reown_src
 FROM ${BITBOX_IMAGE} AS bitbox_src
 FROM ${MONERO_IMAGE} AS monero_src
-FROM ${DECRED_IMAGE} AS decred_src
 FROM ${MWEBD_IMAGE}  AS mwebd_src
 
 FROM --platform=linux/amd64 alpine
@@ -19,5 +17,4 @@ COPY --from=torch_src   /w /w.top
 COPY --from=reown_src   /w /w.top
 COPY --from=bitbox_src  /w /w.top
 COPY --from=monero_src  /w /w.top
-COPY --from=decred_src  /w /w.top
 COPY --from=mwebd_src   /w /w.top

scripts/android/docker/build.sh

@@ -56,8 +56,7 @@ reown_ver=$(tinysha $SCRIPT_DIR/Dockerfile.reown $REPO_ROOT/scripts/prepare_reow
 bitbox_ver=$(tinysha $SCRIPT_DIR/Dockerfile.bitbox $REPO_ROOT/scripts/build_bitbox_flutter.sh)
 monero_ver=$(tinysha $SCRIPT_DIR/Dockerfile.monero $REPO_ROOT/scripts/prepare_moneroc.sh $REPO_ROOT/scripts/android/build_monero_all.sh)
 mwebd_ver=$(tinysha $SCRIPT_DIR/Dockerfile.mwebd $(find $REPO_ROOT/cw_mweb/go -type f))
-decred_ver=$(tinysha $SCRIPT_DIR/Dockerfile.torch $SCRIPT_DIR/Dockerfile.decred $REPO_ROOT/scripts/android/build_decred.sh)
-echo $base_ver $torch_ver $reown_ver $bitbox_ver $monero_ver $mwebd_ver $decred_ver > /tmp/docker_build_versions
+echo $base_ver $torch_ver $reown_ver $bitbox_ver $monero_ver $mwebd_ver > /tmp/docker_build_versions
 final_ver=$(tinysha /tmp/docker_build_versions)
 
 docker create --name temp_extract $(img final $final_ver) \
@@ -85,17 +84,12 @@ build monero "$monero_ver" --build-arg BASE_IMAGE="$(img base "$base_ver")"
 build torch "$torch_ver" \
   --build-arg BASE_IMAGE="$(img base "$base_ver")"
 
-build decred "$decred_ver" \
-  --build-arg BASE_IMAGE="$(img base "$base_ver")" \
-  --build-arg TORCH_IMAGE="$(img torch "$torch_ver")"
-
 build final $final_ver \
   --build-arg BASE_IMAGE="$(img base $base_ver)" \
   --build-arg TORCH_IMAGE="$(img torch $torch_ver)" \
   --build-arg REOWN_IMAGE="$(img reown $reown_ver)" \
   --build-arg BITBOX_IMAGE="$(img bitbox $bitbox_ver)" \
   --build-arg MONERO_IMAGE="$(img monero $monero_ver)" \
-  --build-arg DECRED_IMAGE="$(img decred $decred_ver)" \
   --build-arg MWEBD_IMAGE="$(img mwebd $mwebd_ver)"
 
 echo "done: $(img final $final_ver)"