build: move the module path to /v2

Assisted-by: GLM 5.3 Flash

docs/API.md

@@ -1,10 +1,10 @@
 # API
 
-The library exports the surface below from the `sourcedock.dev/petrbalvin/interpres`
+The library exports the surface below from the `sourcedock.dev/petrbalvin/interpres/v2`
 package. The snippets assume:
 
 ```go
-import "sourcedock.dev/petrbalvin/interpres"
+import "sourcedock.dev/petrbalvin/interpres/v2"
 ```
 
 The parser accepts TOML 1.0 documents plus the TOML 1.1 extensions: date-times

docs/CLI.md

@@ -5,7 +5,7 @@ the toml-test harness adapter, and it also validates documents. Install it
 with Go itself, no release assets involved:
 
 ```sh
-go install sourcedock.dev/petrbalvin/interpres/cmd/interpres-decode@latest
+go install sourcedock.dev/petrbalvin/interpres/v2/cmd/interpres-decode@latest
 ```
 
 ## Synopsis