chore: fetch content from various external sources

docs/04_glossary/canonicalization.md

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+# canonicalization
+## Definition
+In computer science, canonicalization (sometimes standardization or [normalization](https://en.wikipedia.org/wiki/Normalization_(statistics))) is a process for converting data that has more than one possible representation into a "standard," "normal," or [canonical form](https://en.wikipedia.org/wiki/Canonical_form).  
+This can be done to compare different representations for equivalence, to count the number of distinct data structures, to improve the efficiency of various algorithms by eliminating repeated calculations, or to make it possible to impose a meaningful sorting order.
+
+More on source [Wikipedia](https://en.wikipedia.org/wiki/Canonicalization)