refactor(docs/examples): Create a utility methods lib (#1821)

* refactor(docs/examples): create a utility methods lib

* refactor(docs/examples): update examples

* refactor(docs/content): update examples code lines in docs

* fix(docs/examples): move module path

* fix(docs/examples): address uc name

* Update docs/examples/rust/src/lib.rs

Co-authored-by: Thoralf-M <[email protected]>

* Update docs/content/developer/stardust/claiming/nft.mdx

Co-authored-by: Thoralf-M <[email protected]>

* fix(docs/examples): move utils out of lib

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Co-authored-by: Thoralf-M <[email protected]>