docs: fix stale versions, broken links, and invalid API references

- Update dependency versions from 0.3.0/0.4.0 to 0.6 across all READMEs
  and getting-started docs
- Fix MSRV references from 1.86 to 1.92
- Replace invalid API docs (core-types, error-handling, traits) with
  accurate descriptions of per-crate architecture
- Fix incorrect API examples in basic-usage.md to match actual types:
  WdlParser, M2Model, parse_adt(), parse_wmo(), DbcParser
- Remove broken links to non-existent docs (troubleshooting, validation,
  logging, guidelines, migration, testing, reference-implementations)
- Fix Discord invite URL, examples path, indicatif version in CLI doc

Author: danielsreichenbach

README.md

@@ -90,9 +90,9 @@ Add to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-wow-mpq = "0.4.0"
-wow-blp = "0.4.0"
-wow-adt = "0.4.0"
+wow-mpq = "0.6"
+wow-blp = "0.6"
+wow-adt = "0.6"
 # ... other formats as needed
 ```