translate(community): conferences (#722)

* translate(community): conferences

Traduce titolo, intro, intestazioni e frasi ricorrenti di conferences.md
con translationStatus ai-draft e Note AI.

Signed-off-by: Alessandro De Blasis <alex@deblasis.net>
Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(community): address conferences translation review

Normalize hybrid/remote phrasing, translate recurring link labels,
and sync sidebar title with frontmatter.

Signed-off-by: Alessandro De Blasis <alex@deblasis.net>
Co-authored-by: Cursor <cursoragent@cursor.com>

* fix(community): complete conferences translation review

Translate remaining English venue/link labels (Online, Remote event,
Summit online, video link text) and normalize remote-event phrasing.

Signed-off-by: Alessandro De Blasis <alex@deblasis.net>
Co-authored-by: Cursor <cursoragent@cursor.com>

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Signed-off-by: Alessandro De Blasis <alex@deblasis.net>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: deblasis