docs(routing): clarify Any registers handler for any HTTP method

[hyorimitsu]

Summary

Related to labstack/echo#3044.

Clarifies the routing documentation around e.Any(). The previous wording ("registers a handler for all supported methods") was inaccurate — Any registers a handler for any HTTP method, including methods not in Echo's predefined list.

Changes

• Reword the Any description to say it registers a handler for any HTTP method, including ones not in Echo's predefined list.
• Add a note clarifying that a method-specific route registered for the same path takes precedence over the Any route.
• Apply the same updates across all translations (en, es, ja, pt-br, zh-cn).

Notes

Documentation only — no code changes.

[aldas]

LGTM