[chore](trx-rs): centralize version in workspace.package

Add [workspace.package] version = "0.1.0" to the root Cargo.toml and
switch all 21 member crates to version.workspace = true so the entire
workspace is versioned from a single place.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-core/Cargo.toml

@@ -4,7 +4,7 @@
 
 [package]
 name = "trx-core"
-version = "0.1.0"
+version.workspace = true
 edition = "2021"
 
 [dependencies]